Hi @Tom Tirrell
Thanks for your reply!
There are many reasons that can lead to password pop-up issues. There are some common solutions you can try:
- Clear Cached Credentials: Open the Control Panel and go to Credential Manager. >>Under Windows Credentials, locate any entries related to Outlook or Microsoft Office.>>Remove these credentials and restart Outlook.
- Update or Repair Outlook: Make sure your Outlook is up to date. You can also try repairing it via the Programs and Features section in the Control Panel. Repair an Office application - Microsoft Support
- Please try using the Outlook keeps asking for my password diagnostic to troubleshoot issues in which Outlook continually prompts for a password.
In addition, based on user feedback, you can check if this calendar exists in your Outlook client.
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