Hi,

As the KB mentioned, the email address that's stamped in the root folder is determined at the time of profile creation and should reflect the primary SMTP address that's stamped on the user.

Based on my search, I cant find other method to change the display name except creating a new profile.

Additionally, I suggest we can ask question in Microsoft outlook forum to confirm whether it can be achieved by any code related script:

https://social.technet.microsoft.com/Forums/office/en-US/home?forum=outlook

Best Regards,

David 

Need an automated workaround for changing an SMTP address on mailbox in user's Outlook profile when primary email address is changed in Exchange Server 2013.  If the mailbox display name is "cosmetic" as the KB states, I should be able to change an attribute somewhere to reflect the new company domain name rather than recreate all of the mail profiles.  I have looked at user objects in ADSI Edit and didn't see a corresponding field/attribute. 

Does anyone know where that mailbox display name is stored?  I need to change this for a client rather than recreate hundreds of mailbox profiles.

This is the KB stating that it is cosmetic but cannot be changed.

https://support.microsoft.com/en-us/kb/3040795

Need an automated workaround for changing an SMTP address on mailbox in user's Outlook profile when primary email address is changed in Exchange Server 2013.  If the mailbox display name is "cosmetic" as the KB states, I should be able to change an attribute somewhere to reflect the new company domain name rather than recreate all of the mail profiles.  I have looked at user objects in ADSI Edit and didn't see a corresponding field/attribute. 

Does anyone know where that mailbox display name is stored?  I need to change this for a client rather than recreate hundreds of mailbox profiles.

This is the KB stating that it is cosmetic but cannot be changed.

https://support.microsoft.com/en-us/kb/3040795

Hi,

It's on the client side. Outlook profile has static settings. You might want to look into the client side machines and probably write a script to modify the outlook profile.