When changing UPN.

%3CLINGO-SUB%20id%3D%22lingo-sub-1734366%22%20slang%3D%22en-US%22%3EWhen%20changing%20UPN.%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1734366%22%20slang%3D%22en-US%22%3E%3CP%3EWe%20have%20changed%20the%20name%20of%20our%20company.%20Now%20we%20have%20changed%20the%20UPN%20from%20%3CA%20href%3D%22mailto%3Auser%40domainA.com%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Euser%40domainA.com%3C%2FA%3E%26nbsp%3Bto%20%3CA%20href%3D%22mailto%3Auser%40doomainB.com%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Euser%40domainB.com%3C%2FA%3E.%26nbsp%3B%20Most%20users%20logon%20with%20the%20new%20UPN%2C%20start%20outlook%2C%20and%20then%20see%20that%20the%20name%20of%20their%20mailbox%20has%20changed%20to%20%3CA%20href%3D%22mailto%3Auser%40domainB.com%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Euser%40domainB.com%3C%2FA%3E.%26nbsp%3B%20But%20for%20some%20users%20that%20is%20not%2C%20so%20they%20keep%20the%20org%20nam%20as%20%3CA%20href%3D%22mailto%3Auser%40domainA.com%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Euser%40domainA.com%3C%2FA%3E.%26nbsp%3B%20Sending%20emails%20goes%20in%20both%20situations%20with%20the%20nu%20primary%20email%20address%2C%20so%20this%20works%20fine.%3C%2FP%3E%3CP%3EAny%20idea%20why%20this%20happens%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1734366%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1734424%22%20slang%3D%22en-US%22%3ERe%3A%20When%20changing%20UPN.%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1734424%22%20slang%3D%22en-US%22%3EWhy.%20Not%20sure.%20But%20it%E2%80%99s%20a%20local%20profile%20issue%20in%20Outlook.%20You%20can%20redo%20the%20outlook%20profile%20and%20it%E2%80%99ll%20update.%20Wondering%20if%20those%20with%20it%20working%20are%20using%20online%20only%20profiles%3F%20I%20didn%E2%80%99t%20spend%20a%20ton%20of%20time%20on%20it%20but%20I%20know%20it%E2%80%99s%20related%20to%20that.%3C%2FLINGO-BODY%3E
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New Contributor

We have changed the name of our company. Now we have changed the UPN from user@domainA.com to user@domainB.com.  Most users logon with the new UPN, start outlook, and then see that the name of their mailbox has changed to user@domainB.com.  But for some users that is not, so they keep the org nam as user@domainA.com.  Sending emails goes in both situations with the nu primary email address, so this works fine.

Any idea why this happens?

2 Replies
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Why. Not sure. But it’s a local profile issue in Outlook. You can redo the outlook profile and it’ll update. Wondering if those with it working are using online only profiles? I didn’t spend a ton of time on it but I know it’s related to that.
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@Hans_from_Copaco This can be down to a number of factors, but mainly the profile element or even the default mail address settings have been overridden as well within Exchange. 

 

To test the theory, get a user to send an email from OWA and from their device, this would test if it is a mail profile issue.   If that's not the case, check the mailbox addressbook policy and make sure its not been overridden.