Forum Discussion
Curious_Kevin16
Feb 09, 2024Brass Contributor
Outlook Authentication keep prompting after changing Exchange user UPN
We have an Exchange 2016 environment and are planning to move to Hybrid Exchange. We had an issue in the UPN format where we needed to change from "email address removed for privacy reasons" to email...
LeonPavesic
Feb 12, 2024Silver Contributor
Hi Curious_Kevin16,
you can try the following:
Clear Cached Credentials in Windows Credential Manager:
Try clearing the cached credentials on the affected Outlook clients. You can do this through the Windows Credential Manager. Remove any entries related to the old UPN or Exchange server.
Accessing Credential Manager - Microsoft SupportRecreate Outlook Profile:
If the issue persists, consider recreating (remove and create) Outlook profile for the affected user. This will ensure that Outlook is configured with the latest UPN information and other settings.
Remove a profile - Microsoft Support
Create an Outlook profile - Microsoft SupportCheck Autodiscover Records:
Ensure your DNS records for autodiscover.yourdomain.com are correct and point to the Exchange server.
Find autodiscover URL in Exchange with PowerShell - ALI TAJRAN