After mailbox migration Outlook needs a new profile - and teammates do not see calender sometimes

Question

After mailbox migration Outlook needs a new profile - and teammates do not see calender sometimes

IT Guy 106

Dear community

We configured Exchange Hyybrid mode between our Exchange 2016 Server and Office365. I migrated my mailbox sucessfully to O365 but my local installed Outlook 2016 did not switch to the O365 Mailbox . I had to create a new profile in Outlook. We have here "cache mode > ALL" active so i had to download 1.5 GB for my new profile. We also have users who have 5-15GB in the mailbox so download for new .ost file would take much longer. An other user we migrated did not have this problem, his outlook connected sucessfully to Exchange online after the mailbox migration.

Is there a way / workaorund that i do not have to create new profiles in outlook in general or is this a issue that only some users could have ?

The other thing i noticed - after my mailbox was moved to Exchange Online, my teammate could not see my calendar -> message "could not be updated" in calendar view. My teammate then entered his password in a box that popped up and his outlook connected to Office 365 and showed my calender sucessfully.
An other teammate did not get this message box - he had to create a new profile for his own outlook to see my calendar.

Is there someone how knows a solution for that problem maybe ?

Thank you very much for your help.

0 comments

6 answers

Your answer

Answer 1

Tellenbach Stefan 11

Hello ZhengqiLou

Thank you for your feedback. The website you mentioned says:

You are migrating the mailboxes from Exchange 2010 to Exchange 2013 or Exchange 2016. You can face the issue that users with Outlook are not connecting to the Exchange Server.

I am migrating from Exchange 2016 to Office365 - does this solution work for my situation too ? This would really surprise me when a restart of a local Exchange Service would solve this "connecting to the cloud" issue.

Thank you very much for your feedback

Anonymous

2021-06-04T02:44:54.857+00:00

Hi @Tellenbach Stefan ,

I would not say this is 100% available for your issue, but I think restart the MSExchangeAutodiscoverAppPool could make some difference.

Also please use Test Email Autoconfiguration by pressing CTRL and right click Outlook icon and use Autodiscover to test if the URLs are pointing to https://outlook.office365.com/XXX

If not, which means the URLs are still pointing to your on-prem server, then autodiscover would be the cause.
This thread may help: https://serverfault.com/questions/858733/outlook-still-connects-to-on-premise-exchange-after-migration
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

Have a nice day!

Best regards,
Lou

Answer 2

Dear ZhengqiLou-MSFT and LucasLiu

We found a configuration error in our config. The Sharing Policy was not correct configured. We did not thought about that the sharing policy has two connection points - one in the cloud and one onprem on the Exchange Server. After configuring the second end of the Sharing Policy the calendar sharing and visibility works fine. Thank you very much for your help.

The other big problem, that some clients need a new outlook profile after their mailbox is migrated, is still present. After the Outlook message that ZhengqiLou-MSFT shows in his post, some Outlook do not connect to the mailbox that is migrated to the cloud (computer was restarted too).
Under "File" > "Account Settings" is still the old URL to the onprem Exchange and not to Office 365. When i create a new mail profile for the user with that problem, Outlook connects directly to O365 and works perfectly.

A solution for that would be awesome !

Thank you all for your time and efforts.

Anonymous

2021-06-03T09:22:00.27+00:00

Hi @Tellenbach Stefan ,

Glad to know that you have fixed the calendar problem!

For the second issue, you can refer to this article:
https://www.alitajran.com/outlook-not-connecting-to-exchange-after-migration/
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

If that's not the case, are there any error messages after migration?

Hope that could help you.

Best regards,
Lou

Answer 3

Hi @Tellenbach Stefan ,

Based on my test, after you finished the migration, the Outlook client will receive a pop-up:

But you don't have to re-type the credentials. And the shared calendar stays what it was.

What if user C add the calendar manually?

Best regards,
Lou

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 4

Tellenbach Stefan 11

My teammate was not migrated, he added my calendar and in outlook and there was a message in Calendar view "could not be updated" - if then Outlook brings the pop-up message to enter password, my teammate could see my calendar without configure a new profile for his own outlook. Even after he restarted his outlook he could see my calendar without entering his password.

An other teammate did not see a pop up message, so he could not enter his password and he could never see my migrated calendar until he created a new outlook profile for himself.

Other migrated users see my calendar with no problem because we are both in O365.

I also found this website with the "last known good URL" i will try that out, the problem is, it is not always the same situation, some users can connect with current profile, some need a new one, this makes planing the migration quite complicated.

I will update here after the test with the "last known good URL"

Thank you for your help !

Lucas Liu-MSFT 6,196 Reputation points

2021-05-26T09:46:35.25+00:00

Hi @Tellenbach Stefan ,
I am writing here to confirm with you how thing going now?

What do you mean by connecting to "on-premises mailbox" addree? Your email address has changed after the migration?
According to my test, after deploying Exchaneg Hybrid and migrating the on-premises Exchange mailbox to Exchange online, the email address will not change.

----------

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
Tellenbach Stefan 11 Reputation points

2021-05-26T13:27:51.883+00:00

Hi Lucas

I tried to find the point where i talked about "on-premises mailbox" like you mentioned in your post.
Where did i wrote that ? I can not find this text in my post.

Today i tried to find a way to enforce Outlook to ask for credentials when a user with onprem mailbox wants to see a migrated calendar.
A test user could open my migrated calendar with no problem after he entered his credentials in the pop up message, an other user did not get the pop up message therefore he can not see my migrated calendar.

I also tried a few other reg key like the "ExcludeLastKnownGoodURL" but no one was able to enforce pop up for credentials to see online calendars.

in a blog, someone wrote about the windows credentials manager - is there maybe a value i can delete to enforce Outlook so that is asks for password for access to O365 calendars ?
Lucas Liu-MSFT 6,196 Reputation points

2021-05-31T05:24:24.653+00:00

Hi @Tellenbach Stefan ,
1.When you first responded to me, you mentioned "it always connected to the "onprem mailbox" address".Do you mean that the mailbox will try to connect to the on-premises Exchange Server?

2.Please hold down the "Ctrl" key and right-click the Outlook icon, and use "Test Email AutoConfiguration" to view the specific process that you automatically discovered.

3.For the "Windows credentials manager". For the frequently used verification method, when we enter the mailbox credentials and click "Remember my credentials". The "Windows credentials manager" that will be stored on the computer. When we log in to the mailbox next time, we do not need to enter our credentials again to log in to the mailbox.
Lucas Liu-MSFT 6,196 Reputation points

2021-05-31T05:24:49.713+00:00

If you clear the cached credentials stored in the "Windows credentials manager", you will need to re-enter your email account and password to log in successfully next time you log in.

----------

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
Tellenbach Stefan 11 Reputation points

2021-05-31T06:12:19.3+00:00

Hi Lucas

Thank you for your feedback.

My main problem is that, when i migrate User A to Office 365, User B (who is still onprem with his mailbox) can see the calendar of User A after User B enters his password in a window that pops up, so for User B everything is fine. Migrated User always see calender from onprem mailboxes.

User C (who is still also onprem like User B) tries to open the calendar of User A and he does not get that Pop Up message to enter his password, so he can not see the calendar of User A until his own mailbox is migrated to Office365.

Is there any change to force Outlook to show this pop up window so that onrem users can enter their password and see migrated calendars ?

Answer 5

Hi @IT Guy ,
After you migrate, will there be any errors when logging in to Outlook directly without re-creating the Outlook profile?

Regarding the calendar, your teammate needs to enter a password or re-create the outlook profile to see your calendar. I think their mailbox was not connected to Exchange online correctly before. Will their mailbox work normally without rebuilding the outlook profile or entering the password?

According to my test, I migrate a mailbox from on-premises Exchange server to Exchange online in hybrid environment. Afterwards, I can log in to the mailbox successfully without rebuilding the outlook profile.

I found a similar known issue. The cause of the issue is when the name of the pre-migration Autodiscover server is cached in your Outlook profile in the registry. You could refer to: After migration to Office 365, Outlook doesn't connect or web services don't work

----------

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Tellenbach Stefan 11 Reputation points

2021-05-21T09:35:23.707+00:00

Hi Lucas

Thank you very much for your feedback.

>>I saw no errors in outlook, it just did not connect to O365.

When i migrated my mailbox, my outlook did not connect to the migrated mailbox in o365. I restarted my Outlook 2016 a few times and nothing changed, it always connected to the "onprem mailbox" address, this means i only saw my mails from the cached .OST File but did not see new mails. After i created a new profile i saw that outlook was connected to O365 and i also saw the new mails. Other test users did nod had that problem, after they restarted outlook they were connected to O365 with the current profile.

Share via

After mailbox migration Outlook needs a new profile - and teammates do not see calender sometimes

6 answers

Your answer