OnPrem Lync/Skype and Office 365

Had an issue with mailboxes migrated to Office 365 while using OnPrem Lync/Skype.

Lync showed a constant “Enter Credentials” dialog:


The KB appears to have fixed it: Office 2013 and Lync 2013 periodically prompt for credentials to SharePoint Online, OneDrive, and Lync Online

A simple registry key that you can rollout with a GPO.

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