support.microsoft[.]com/en-us/topic/outlook-closes-shortly-after-it-is-opened-2d32d880-70a0-4ee0-b1e9-9e920721abdd
When you start Outlook Desktop, it gets past loading profile and processing, briefly opens, and then stops responding.
This issue occurs when the EmailAddress string data value under the Office identity is blank.Registry path: Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\Identity\Identities
The Outlook team is investigating this issue. We will update this topic when we know a fix will be available.We do not know why the EmailAddress key is not being set properly. It’s best if this key is set by the Office application, so it is preferred to use the most supported options first.
To work around the issue, try the following suggestions:
Sign out of Office and then sign back in to Office to repopulate the identity registry settings. For more information, use Sign in to Office.
If the identity is still not getting set properly you can turn off Support Diagnostics which turns off the option to submit an In App ticket using Help, Contact Support, and its feature path that triggers Outlook to stop responding. For more information, use Disable support diagnostics in Outlook.
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General]
"DisableSupportDiagnostics"=dword:00000001You can try manually setting the email address to the identity of the user that is seeing the issue in the registry path referenced in the issue specifics above.