Outlook keeps prompting for password

Good Article at Technet

Outlook keeps prompting for password could be caused by several reasons:

  • Outlook is configured to prompt you for credentials
  • Incorrect password cached in credential storage
  • Required Authentication Settings for outgoing server and incoming server
  • Outlook Anywhere is not configured to use NTLM Authentication
  • Corrupt Outlook profile
  • Slow or unstable network connection
  • Antivirus programs
  • Shared calendars


A forum article discussed this issue in detail, please follow the instructions in the article to troubleshoot the issue:





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