Assume that Microsoft Lync 2010 for Android is installed on a device that is running Android 4.2 or Android 4.2.1. When you try to sign in to Lync 2010 for Android on the device, the sign-in operation fails. Additionally, you receive the following error message:
Can't sign in.
The issue occurs because the Android 4.2 or Android 4.2.1 client unexpectedly sends a web ticket that includes an empty password value. Therefore, the web ticket authentication process fails.
To resolve this issue, install the following cumulative update:
2793823 Description of the cumulative update package for Lync 2010 for Android: December 2012
For more information about the Web Ticket Service Server, go to the following Microsoft website:
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