The Microsoft Support team just released a comprehensive article that describes how to troubleshoot sign-in issues that may occur when you use Microsoft Lync 2010 together with Microsoft Lync Online in a Microsoft Office 365 environment. Read the article at How to Troubleshoot Sign-In Issues in Lync Online.

Author: NextHop

Publication date: August 24, 2012

Product versions: Microsoft Office 365 for enterprises, Microsoft Office 365 for small businesses, Microsoft Office 365 for education

Topics include:

  • Scoping the sign-in problem
  • Lync Online sign-in error messages
  • Resolve Lync 2010 client-side issues
    • Resolve Lync cached endpoints
    • Resolve certificate-related errors in Lync 2010
  • Resolve DNS and network-related sign-in problems
    • Bypass Lync 2010 Autodiscover and DNS resolution
  • Resolve user identity and Office 365 authentication system issues in Lync 2010
  • Next steps, if the issue is not resolved
    • Diagnose authentication issues by using MOSDAL and Snooper

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