This issue is for an on prem to on prem cross forest exchange mailbox migration... also getting new primary email address.
We migrate AD account then migrate mailbox and workstation together.
When we log into the into the Outlook after the workstation has been migrated, everything connects nicely. Outlook is updated and all mail and folder are there. The only thing different is that the mailbox name is showing the legacy email address.
If we create a NEW outlook profile then the mailbox name shows as expected in Outlook.
How can we update mailbox display name without creating a new profile?
I have tried this to update this - HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Profiles.....
But this only updates the display name in the account properties... not the mailbox display name
I want to update this
Any suggestions? something is cached in the profile somewhere