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Error message when you try to sign in to Lync Online: "Cannot sign in to Lync because this sign-in address was not found"
Article ID: 2705378 - View products that this article applies to.
Not sure what release of Office 365 you're using? Go to the following Microsoft website:
Am I using Office 365 after the service upgrade?
When you try to sign in to Microsoft Lync Online, you receive the following error message:
Cannot sign in to Lync because this sign-in address was not found. Please verify the sign-in address and try again. If the problem continues, please contact your support team.
To resolve this issue, first make sure that the user is licensed for Lync Online in the Microsoft Office 365 portal. After the user is licensed, he or she will be displayed in the Lync Online Control Panel or Lync Admin Center in the list of users.
If the user is licensed for Lync Online and still can't sign-in, set the value of msRTCSIP-UserEnabled to TRUE in the on-premises Active Directory schema, force a directory synchronization, and then wait 30 minutes. To do this, follow these steps:
This issue may occur if one or more of the following conditions are true:
Still need help? Go to the Office 365 Community
Article ID: 2705378 - Last Review: May 15, 2013 - Revision: 8.0