Consider the following Scenario:

  • You log on to Microsoft Lync Online.

  • You save the logon password.

  • You log off Lync Online.

  • You delete the credentials that are used to connect to Lync Online in Windows Credential Manager.

  • You log on to Lync Online again.

In this scenario, Lync 2010 does not prompt you for credentials.

Note This issue specifically occurs when you have a Session Initiation Protocol (SIP) certificate that is saved locally.


To resolve this issue, install the following cumulative update:

2496325 Description of the cumulative update package for Lync 2010: April 2011


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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