A CNAME for AutoDiscover pointing to the name - yes. The public DNS A record for autodiscover.mycompany.co.za pointed to my TMG. vas_ppabp_90 Login credentials This is a rare case and typically not the cause of generic Autodiscover issues. What settings/tuning do I need to fix on 2016 so we overcome this issue? on Get-Autodiscovervirtualdirectory. Do you have all the mailboxes moved to the cloud? Once verified, Bob will get Autodiscover configuration in xml format. But your articles are spot on. Open the Server Manager and click on Tools > DNS. So how do we delete this SCP for the old Exchange server? The public DNS A record for autodiscover.mycompany.co.za pointed to my TMG. Read more: Configure Internal and External URL in Exchange Server . Autodiscover must be published to the Internet. Assuming that both the Exchange Servers are the Client Access Servers (CAS). Case: Autodiscover set to Exchange Online (EXO) * Outlook client ask for autodiscover . Microsoft should create a new award thats called MVP of all MVPs and award it to you. For On-premise mailbox, it remain use previous autodiscover lookup behavior to find endpoint and access to Exchange. Autodiscover DNS check. A hybrid exchange is also riskier than a . Exchange on-premises will automatically direct clients to autodiscover for Exchange Online. So if I delete this SCP for old Exchange server, try Setting up a new profile on a PC. niazstinu We have Exchange Hybrid set up. Thanks. On the on-premise DNS servers I noticed we had static A records configured namely: autodiscover.mycompany.local and autodiscover.mycompany.co.za both of which resolved to the internal IP of the exchange server. Direct connect to Office 365. If you were to even start the process by pointing the Autodiscover Records to Exchange Online, you would immediately break some features like hybrid public folder access. September 26, 2016. Point the autodiscover record to mail.exoip.com. Domain-joined machines that are on-network will ALWAYS use this first, unless specifically configured not to via registry or Group Policy. ThanksML, When running: set-ClientAccessServer -identity EX01 -AutoDiscoverServiceInternalUri $null on Exchange 2016 server. In Exchange IIS, you can see Autodiscover Virtual Directory which is available for the Autodiscover Settings. In Exchange PowerShell, execute the following command. Autodiscover information from an external point of view. Thats when you want to null the autodiscover internal URL in the Exchange on-premises server. Do you have mailboxes in Exchange on-premises only or both the mailboxes on-premises and in the cloud? If all mailboxes has been migrated to Exchange online. Type your email and password. Frustration about the autodiscover URL when you migrate to Office 365/Microsoft 365. 1 maybe_1337 2 yr. ago Thank you for your help. However, what exactly is the problem or disadvantage if the Autodiscover record points to EO and I still have a few admin- or service mailboxes OnPrem (all shared- and user mailboxes are in the cloud)? If the user has not set up a personal office account, then Office 365 will automatically discover all the user's files, including the files of organizations that the user is associated with. June 05, 2020. While in Hybrid, keep the autodiscover record pointing to on-premises. For this reason, we will choose the Exchange Server tab. Autodiscover URL in Exchange Hybrid deployment, Point autodiscover URL to Exchange on-premises, Point autodiscover URL to Exchange Online, Find autodiscover URL in Exchange with PowerShell, Configure autodiscover URL in Exchange with PowerShell, Configure Internal and External URL in Exchange Server , Find IP addresses using Exchange SMTP relay, Create Office 365 resource mailbox in Exchange Hybrid, Bulk create Office 365 mailboxes in Exchange Hybrid, Mailbox type difference in Exchange Hybrid, Restart Exchange Servers IIS with PowerShell, Protect Exchange Server OWA/ECP from brute force attacks, Prevent Exchange mailbox user login after account changes, Enable Azure MFA geographic location for extra security. The SCP object finds the suitable Autodiscover server or endpoint for the person attempting to connect. I then changed the public facing DNS record for autodiscover and pointed it to Office 365. November 18, 2020, by Autodiscover lookup process varies based on your client location (internal/external for on-prem users) and using your SMTP domain, DNS entries for external and O365 users. I configure Autodiscover the same way as you recommended. Inside the organization where clients are domain joined they find Autodiscover using SCP (Service Connection Point) which is created in Active Directory when deploying Exchange Server in the organization. And run the following command to remove the Servcie Connection Point(SCP) values on your Exchange servers. Click OK. Click Done. you can point your autodiscover to O365 then, Autodiscover configuration in full hybrid, After the mailbox move is complete, Exchange Server 2013 or Exchange Server 2016 continues to proxy the EWS request to Exchange Server 2010. Join the movement and receive our weekly Tech related newsletter. Make sure that you point the autodiscover URL to the Exchange on-premises server as long as you have mailboxes located on-premises. If it's the case, then we can go ahead and point the Autodiscover and MX record to Office 365. Your articles are the best in the world. Autodiscover in an Exchange Hybrid environment Posted by DDoc Solved Microsoft Office 365 Microsoft Exchange We have an Exchange hybrid environment with all our mailboxes residing on Exchange Online. The onprem Exchange server is only being used for management, SMTP Relay and sending emails via the Pickup folder. Use the AutoDiscoverServiceInternalUri parameter to null the autodiscover internal URL. Exchange Server 2010 responds with a 302 redirect back to Exchange Server 2013 or Exchange Server 2016", https://docs.microsoft.com/en-us/exchange/decommission-on-premises-exchange, Re: Autodiscover configuration in full hybrid, outlook 2010 and 2013 continually asks for password in hybrid environment, Exchange Hybrid - Outlook 2013 Autodiscover Issue. Configuring on-premises mailboxes in Outlook will not work when you point the autodiscover record to EXO. All of my mailboxes have been moved into Office 365. August 13, 2020, by Right-click on the empty area and choose New Host (A or AAAA). Basically This is what happen case: Audiscover set to Onpremises * Outlook client ask for autodiscover * Autodiscover gets the answer from Onpremises * if the mailbox is onpremises get the answers immediately, if the mailbox is on cloud the request is passed via HTTPS to O365. on Verify that the DNS record is published correctly. In the previous articles, we already did write about the autodiscover URL. The_Exchange_Team Figure 6. Sharing best practices for building any app with .NET. Step 1: Configure DNS. Pointing to both the Exchange Servers EX0-2016 and EX02-2016. If it's not, then we will still need to point the Autodiscover record to the on-premises hybrid server. autodiscover is pointing to Ex2016 already. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. ThanksML, Hi Mate, Thanks for that, which command should I use: Get-ClientAccessServer | Set-ClientAccessServer -AutoDiscoverServiceInternalUri $Null or Get-ClientAccessService | Set-ClientAccessService -AutoDiscoverServiceInternalUri $Null, Hi Thanks Our Firewall system is pretty messy at the moment, there are lots legacy staff. Use the Get-ClientAccessServer cmdlet to check the autodiscover internal URL. Thanks,ML, Hello, Yes remove it set-ClientAccessServer -identity old2010 -AutoDiscoverServiceInternalUri $null You can also diagnose the autodiscovery process with oultookctrl + right clic on outlook button and check the autodiscover way, Hi thanks for that now I can see definitely it is checking: ex2010.domainname.edu/autodiscover/autoxxx.xml and then redirection to [email protected] so if I delete this entry, would it generate any issues if external DNS autodiscover.domain.external.au is still pointing to the old server? Required fields are marked *. On an internal machine, ping to the autodiscover DNS record. Apr 29th, 2022 at 1:36 PM. Thank you for this article, very helpful! Autodiscover provides Outlook configuration in format of XML file in order to reduce configuration steps. We have encountered a problem where we are logging in from the internal network and users are prompted to enter their login credentials (the ADFS login page will appear as we use ADFS). * Mailbox gets the answer. In the RCA select the Office 365 tab and check Outlook Autodiscover in the Microsoft Office Outlook Connectivity Tests section. September 18, 2019, by Point the autodiscover URL to the Exchange on-premises server. Hope everyone is well. In this article, you learned when and how to set up autodiscover URL in Exchange Hybrid deployment. Click Test button. We have dozens of mailboxes in the Cloud, the rest in On-premise. So in attempt to point my autodiscover records to Office 365 I deleted those 2 static A records from the on-prem DNS server. Also, can you let us know if this happens for Exchange 2016 mailbox or Office 365 mailbox? The_Exchange_Team The term "Autodiscover client", describe the element that needs to retrieve the Autodiscover information from the Autodiscover Endpoint (Exchange server). Helped with unblocking attachments in outlook emails, Exchange 2010 to Exchange Online public folder migration fails. Autodiscover constructs addresses in the format shown below, hoping to find the Autodiscover.xml file containing settings necessary to connect the email client to the user's Exchange Server.. It can be an A record or a CNAME record. Pointing to the load balancer. Enter your credentials, check the two check-boxes, enter the verification code and click Next. Enter email address, user account and password, enter the verification code and click Perform Test. Assuming that both the Exchange Servers are the Client Access Servers (CAS). After authentication it will try to validate the user and it cant find mailbox forBoband only remote mailbox account available for this user in On-Premise and it will inform outlook to try Autodiscover request for Bobs Target Address. Did you enjoy this article? Autodiscover.contoso.mail.onmicrosoft.com will have a CNAME record that points to Exchange Online Autodiscover record. Should I run this command on old server itself? on ML, Hi There, In our local DNS, Autodiscover.domain.com is definitely pointing to the new Exchange server 2016. Will take sometimes to clean up. You could set up the Autodiscover DNS records point to Exchange online instead of to on-premises. There are several ways for Outlook to find which Exchange server it must contact, and that's in this particular order: SCP (Service Connection Point) in Active Directory. Hi, What is the value set on the AutoDiscoverServiceInternalUri for Exchange 2010 and Exchange 2016? In the table below, you can see where to point your autodiscover URL to in an Exchange Hybrid deployment. So create a CNAME in my internal DNS zone pointing to autodiscover.outlook.com? LIT-RS ThanksML. Configure the autodiscover CNAME record in Public DNS. Do you need to point the autodiscover record to the Exchange on-premises or Exchange Online? If you use the CNAME record, it must refer to the FQDN of an on-premises Exchange server that has the Client Access server role installed. Therefore, if the autodiscover does not point to the right environment, it will not load the assigned mailboxes and show many errors. Otherwise, the mailboxes hosted on the on-premises Exchange server will not able to use the Autodiscover services. The Autodiscover flow should start by addressing the Exchange on-Premises serve and based on the "redirection message" that will be provided to the Autodiscover client, continue the Autodiscover flow by addressing the Exchange Online infrastructure. Username is recognized and after a couple of seconds everything is setup just fine. Inside the organization where clients are domain joined they find Autodiscover using SCP (Service Connection Point) which is created in Active Directory when deploying Exchange Server in the organization. Try removing it if its added. Local Autodiscover.xml file. Attachments: Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total. AUTODISCOVER AUTODISCOVER HYBRID EXCHANGE ONLINE AUTODISCOVER, Guidance for Newly Reported Zero-day Vulnerabilities in Microsoft Exchange Server, How to List users Authentication contact info attributes from AzureAD. The best way to show this is by using the Remote Connectivity Analyzer on http:/www.testexchangeconnectivity.com. If you use a Load Balancer, create a VIP on the load balancer. Always well written with your experience. Best practices and the latest news on Microsoft FastTrack, The employee experience platform to help people thrive at work, Expand your Azure partner-to-partner network, Bringing IT Pros together through In-Person & Virtual events. Hi Vasil. Read more , It's good to through the Exchange Hybrid test plan checklist before you start to migrate, How to bulk create Office 365 mailboxes for existing AD users in Exchange Hybrid configuration?, We see a mailbox with a different mailbox type in Exchange on-premises and Exchange Online.. We have set it up according to the instructions, autodiscover.domain.com points to local Exchange servers, but while trying to go to outlook.office365.com, can this be somehow prevented and tell Outlook to use only SCP? Check Use AutoDiscover option. During the installation process, Exchange 2019 establishes an Autodiscover virtual directory in IIS on the server. You need either to have a cname for AutoDiscover inside that DNS zone or do as @vasil says and point AutoDiscover at your onprem Exchange management server. In this article, we discuss when and how to configure autodiscover in Exchange Hybrid deployment. Recreate audit log mailbox in Exchange Server, Change Users UPN automatically with scheduled task, Azure AD Connect sync export error dn-attributes-failure. Any advice on best how I can resolve this? Support us: https://www.buymeacoffee.com/itproguide Learn Exchange Server / Hybrid / Migration / DAG full course from: Course 1: Exchange Server Train. Cached URL in the Outlook profile. by on In hybrid the Autodiscover will be pointing to on-premise Exchange Server. Point the autodiscover.domain.com to Exchange 2016 server. Ensure you get a reply from an external IP address and not the internal load balancer or Exchange Server. If so, please check if the Exchange 2010 IP is still added in the VIP in load balancer. Exchange PowerShell shows multiple Autodiscover URL - The following figure shows the three phases of the Autodiscover process. If it did not work, I can still add back the old SCP, like: Set-ClientAccessServer -Identity ex2010 -AutodiscoverServiceInternalUri https://autodiscover.domainname.edu/Autodiscover/Autodiscover.xml AM I correct? They also do not blatantly mention certain things you have to read between the lines. Autodiscover provides Outlook configuration in format of XML file in order to reduce configuration steps. Point the autodiscover record to autodiscover.outlook.com. I meant can I add it back by the command: Set-ClientAccessServer -Identity ex2010 -AutodiscoverServiceInternalUri https://autodiscover.domainname.edu/Autodiscover/Autodiscover.xml Can you clarify this is right command to add the AutoDiscover back please? I got this error (mail01 is Exchange 2016): You can't make this change because 'CN=EX01,CN=Servers,CN=Exchange Administrative Group(FYDIBOHF23SPDLT),CN=Administrative Groupsxxxxx =au' is read-only to the current version ofExchange. And of course, Hybrid Wizard was executed and AD connect has the Hybrid Exchange option ticked. Restart the Internet Information Services (IIS). February 04, 2021, by Ali, you are way above all these MVPs. Once the user launches the outlook and enter the credential, Outlook will query Active Directory for SCP record to get the Autodiscover Service information. You can also add host file entry on the client machine for autodiscover.domain.com to point to Exchange 2016 to make sure if the delay is actually on the Exchange server or reaching the server. In the Hybrid environment, Autodiscover needs to point to your on-premises Exchange server instead of Autodiscover .outlook.com. As of last, remove the internal DNS autodiscover entries. You could change the MX record to point to Exchange Online Protection if it is not already, you could even remove some of the on-premises Exchange servers. O365 - Autodiscover Lookup Process Thanks for the reply.Since the article https://docs.microsoft.com/en-us/exchange/decommission-on-premises-exchange scenario 3 says:We recommend against removing Exchange and the hybrid configuration at this point. You may also like Find IP addresses using Exchange SMTP relay. Your email address will not be published. On an internal machine, ping to the autodiscover DNS record. Click on Forward Lookup Zones and then on your domain name. The very first Autodiscover step is to check the registry for some special "boot" information that tells Outlook that you are in the middle of one of these restart scenarios and to read the Autodiscover payload from the special local file. February 08, 2021, by You have to do that with Exchange Management Shell (PowerShell). Thats because it will reach outlook.autodiscover.com. Thanks for answer, give me sometimes to find out. Run Exchange Management Shell. Its Free. Configure the autodiscover CNAME record in Public DNS. Pointing to both the Exchange Servers EX01-2016 and EX02-2016. Make sure that you point the autodiscover URL to the Exchange on-premises server as long as you have mailboxes located on-premises. If you use an A DNS record, it needs. Now if I turned off Exchange 2010 server, seems AutoDiscovery is very slow, took about 2 minutes to find the user profile when setting up Outlook. Remove the autodiscover DNS entries in the internal DNS. Click Service, and then type _autodiscover Click Protocol, and then type _tcp Click Port Number, and then type 443 Click Host offering this service, and then type the Autodiscover.incapital.com. on December 06, 2017, by If all mailboxes has been migrated to Exchange online. I've done all the settings / records for DNS (autodiscover). In this Session we are going to see What is AutoDiscoveer, How it helps Exchange Mailboxes to configure. We have a hybrid Exchange setup with Office 365. If you were to even start the process by pointing the Autodiscover Records to Exchange Online, you would immediately break some features like hybrid public folder access. Exchange mail client Just a CNAME, no that would not be correct, Hybrid Exchange - Autodiscover records for on-premise, Re: Hybrid Exchange - Autodiscover records for on-premise, AADconnect with Exchange server but without Hybrid Config - Managing users, Scenario: New AADconnect server in new Forest - All mailboxes in EXO O365, Using EOL protection but keep autodiscover using on-premise, Exchange On-Premises Best Practices for Migrations from 2010 to 2016, Announcing Hybrid Modern Authentication for Exchange On-Premises, On-Premises Architectural Requirements for the REST API. In our example, there are two Exchange Servers in the organization. on on Add two CNAME or A records in the internal DNS server for autodiscover.exoip.com. HTTP Redirect. So how do we delete this SCP for the old Exchange server? Root Domain check. Machines are alle domain joined. More on that down below. Exchange Server 2010 responds with a 302 redirect back to Exchange Server 2013 or Exchange Server 2016". pazzoide76 In this article, you learned when and how to set up autodiscover URL in Exchange Hybrid deployment. Did you enjoy this article? Exchange Online validate the user by an authentication. Also, there are lots Mailboxes are migrated from Old Exchange 2010 to Exchange 2016 and to Office 365. Let's suppose it is set to autodiscover.domain.com for both Exchange 2010 and 2016, does the DNS record for autodiscover.domain.com is pointing to the Load balancer VIP? Thanks Brian. Welcome to Exchange Auto discover Deep dive session. *After migrating all the mailboxes to Exchange Online, and everything works as expected, you can point the autodiscover URL to Exchange Online. Exchange Web Services must be published to the Internet, or as a minimum the Office 365 IP address ranges. I tried the registries: ExcludeExplicitO365Endpoint, DisableAutodiscoverV2Service, but without success. I needed some advice please. It makes looking for Autodiscover servers for domain-joined mail clients simple. I don't have any mailboxes on premises.The on premise server has a connector that allows the relay of the email in an unauthenticated way because an old application must send email to the internet. Find out more about the Microsoft MVP Award Program. The problem now is that within the LAN autodiscover.mycompany.co.za is not resolving. so I can delete SCP connector? If you dont configure the admin mailboxes or service mailboxes in Outlook, its OK to point the autodiscover record to EXO. Outlook will connect Autodiscover.outlook.com endpoint. When we install Outlook 2016 autodiscover works just fine. The FQDN will automatically update to the name.yourdomain.com. It seems to be an issue on the side of Exchange but I'm not able to dig much out of it. In our example, we will run the command against both Exchange Servers. In hybrid environment, on-premise Autodiscover can redirect to Office 365 but Autodiscover pointing to Exchange Online cant redirect to on-premise Exchange Server. Check the registry for: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\AutoDiscover\ExcludeExplicitO365Endpoint. The following URL paths (or /ews/* and /autodiscover/*) must be published without pre-authentication enabled: /autodiscover/autodiscover.svc /autodiscover/autodiscover.svc/wssecurity When outlook client opens, it will send LDAP request to the Active Directory. But specifically in your case you deleted AutoDiscover from your internal DNS zone of mycompany.co.za so you cannot resolve that record inside the company. Thanks, Also, did a bit research, found out these: Get-Mailbox -Arbitration Name Alias ServerName ProhibitSendQuota SystemMailbox{1f05a927 SystemMailbox{1f0 ex01 UnlimitedSystemMailbox{e0dc1c29 SystemMailbox{e0d ex01 UnlimitedFederatedEmail.4c1f4d8 FederatedEmail.4c ex01 1 MB (1,048,576 bytes)SystemMailbox{bb558c35 SystemMailbox{bb5 mail01 UnlimitedMigration.8f3e7716-201 Migration.8f3e771 mail01 300 MB (314,572,800 bytes)SystemMailbox{D0E409A0 SystemMailbox{D0E mail01 UnlimitedSystemMailbox{2CE34405 SystemMailbox{2CE mail01 Unlimited Should I move all Three Arbitration mailboxes from Old exchange database to New Exchange database? Type the name, such as mymail, webmail, or anything you prefer. In our example, we have a Kemp load balancer with internal IP 192.168.1.54. Luckily, Autodiscover defines a limited number of places for you to look. Outlook clients will not be able to connect to o365? Find out more about the Microsoft MVP Award Program. In this tutorial I demonstrated how to prepare for a Hybrid Exchange deployment with Office 365 by adding domain names to the Office 365 tenant, and by installing and configuring AAD Connect to provide directory synchronization. Should I run this command on old server itself? And keep the internal record as well. So its good to go through these articles and understand how to set up autodiscover URL in Exchange Server. [adrotate banner="50] It depends on the current scenario that if all users are migrated to Exchange Online and no one left behind or some mailboxes exist on Exchange On-premise and others on Exchange Online. Also, I did Get-ClientAccessServer | fl AutoDiscoverServiceInternalUri AutoDiscoverServiceInternalUri : https://ex2010.mydomainname.edu/Autodiscover/Autodiscover.xml AutoDiscoverServiceInternalUri : https://ex2016.mydomainname.edu/Autodiscover/Autodiscover.xml There are two autodiscoverInternaluriShould I remove the old Exchange 2010 AutoDiscoverServiceInternalUri?? LIT-RS In a hybrid scenario, an Autodiscover request made after a mailbox migration is presented to the on-premises Exchange CAS as normal. Most of the time, you will not have to edit anything because its already set. by Current Visibility: Visible to the original poster & Microsoft, Viewable by moderators and the original poster. Hybrid server migration from one forest to another forest, Connector Id And connector IP are blank in Message trace, Hi I have been removing our Old Exchange server 2010 from our Hybrid Environment (Exchange 2010 & Exchange 2016 & Office 365) . I have read many articles and most of them they say that "After the mailbox move is complete, Exchange Server 2013 or Exchange Server 2016 continues to proxy the EWS request to Exchange Server 2010. RCA will now perform an Autodiscover test based on the email address you've used. If an Answer is helpful, please click " Accept Answer " and upvote it. Agree with the reply above, we need point autodiscover record to On-premise Exchange server during hybrid environment. on In above illustration, organization usercontoso.comas their SMTP address space and for the mailboxes in Office 365, On-Premise will have a remote mailbox account with the target address as contoso-mail.onmicrosoft.com as the target address. Press Ctrl+Right-click on outlook application icon in system tray. Everything works except the autodiscover part. How do I found Load balancer VIP? ALI TAJRAN is a passionate IT Architect, IT Consultant, and Microsoft Certified Trainer. I think all all DNS entries are pointing back to the new server.. I have a question related to similar case, I have migrated all users from Exchange 2010 to Exchange 2016, we still have both Exchange servers but users mailboxes are on the 2016, we have two issues I think both are related to the autodiscover, whenever a user create a new meeting and add attendees from the same company (domain) they cannot see the free/busy time and the same if they add a Calendar of meeting room (resource) it shows no connection at the top of the Calendar of that meeting in their Outlook! Ross Smith IV Microsoft has too many pages of documentation and I am picking up more and more where Microsoft is contradicting themselves. He started Information Technology at a very young age, and his goal is to teach and inspire others. Three phases of the Autodiscover process Phase 1: Defining the candidate pool Before you can use Autodiscover, you have to locate the right Autodiscover server for your user. I got this error (mail01 is Exchange 2016): You can't make this change because 'CN=EX01,CN=Servers,CN=Exchange Administrative Group(FYDIBOHF23SPDLT),CN=Administrative Groupsxxxxx =au' is read-only to the current version ofExchange. Please also check the log of test Email AutoConfiguration, you could share the result here, to help determine the steps of autodiscover. Also, autodiscover automatically loads all mailboxes for which the user has full access permissions. This is the default autodiscover record for Exchange Online. In hybrid environments, on-premises autodiscover is typically an SCP record pointing to a local Exchange server. However, you would need to keep enough in place to handle the remaining hybrid functions. This is key to how Autodiscover requests are redirected to Office 365 once a mailbox migrates to Exchange Online. Pointing autodiscover to EX or EXO is essential for an optimal working Exchange environment. Outlook Client sends LDAP query to Active Directory to look for SCP . Autodiscover will utilize TargetAutodiscoverEpr value (DiscoveryEndpoint address) to lookup using HTTP redirect method (redirectAddr property). . and either delete that key or make sure the value is set to 0. You can also view logs of autodiscover from Outlook application. DNS Autodiscover has been pointing to Exchange 2016 server already. So what would be the best way to check and move Autodiscover to the new Exchange sever? August 11, 2020, by Once verified, Bob will get Autodiscover configuration in xml format. After that, null the internal autodiscover URL on the Exchange on-premises server. But once I powered off Ex2010, Outlook on Client machine will take 2-3 minutes to find profile. If all mailboxes are in the cloud, autodiscover can be pointed to Exchange Online. Verify that the autodiscover internal URL is nulled. Also, remove the internal DNS entries which point to the autodiscover URL. On the on-premise DNS servers I noticed we had static A records configured namely: autodiscover.mycompany.local and autodiscover.mycompany.co.za both of which resolved to the internal IP of the exchange server. Cabarrus300 For example, teams can access the calendar and free/busy sharing also works. Follow us on social media and keep up with our latest Technology news. Usually, this would lead to a very small on-premises footprint.Are you sure it can make the autodiscover service point on O365?If the answer is yes on the server on premise I have to type the command Get-ClientAccessService | Set-ClientAccessService -AutoDiscoverServiceInternalUri $ Null?Also do I have to point the dns record, both for internal and public dns, to autodiscover.outlook.com? After 5 to 10 minutes, check the record with the MxToolbox CNAME lookup. SRV DNS records check. Exchange Online validate the user by an authentication. CategoryInfo : InvalidOperation: (:) [Set-ClientAccessServer], CannotModifyCrossVersionObjectException FullyQualifiedErrorId : [Server=MAIL01,RequestId=09188cba-c798-42ed-8d28-a89f27ec9438,TimeStamp=7/10/2020 11:38: 08 PM] [FailureCategory=Cmdlet-CannotModifyCrossVersionObjectException] C84E4D3D,Microsoft.Exchange.Management.SystemConfigurationTasks.SetClientAccessServer PSComputerName : mail01.domainname.edu We are running a hybrid of Exchange 2010 and Exchange 2016.

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