First published on TECHNET on Jul 06, 2012
If you're experiencing sign-in issues using Microsoft Lync 2010 together with Microsoft Lync Online in a Microsoft Office 365 environment, see
How to troubleshoot sign-in issues in Lync Online
from Microsoft Support.
This article details how to troubleshoot sign-in issues and includes the following topics:
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Scoping the sign-in problem
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Lync Online sign-in error messages
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Resolve Lync 2010 client-sides issues
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Resolve Lync cached endpoints
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Resolve certificate-related errors in Lync 2010
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Resolve DNS and network-related sign-in problems
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Bypass Lync 2010 Autodiscover and DNS resolution
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Resolve user identity and Office 365 authentication system issues in Lync 2010
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Next steps
Lync Server Resources
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