- Active Directory Federation Services (ADFS) is deployed on-premises in a Microsoft Lync Server 2013 environment.
- You log on a computer that is running Microsoft Windows 7 by using an on-premises account in the environment.
- You enable the DisableNTCredentials key in the following registry path:HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator\
- You try to sign in to Microsoft Lync 2013 by using a Microsoft Office 365 account on the computer.
Note Lync 2013 passes the on-premises credentials to ADFS.