Cannot sign in to Skype for Business 2015 (Lync 2013) when you register the domain as a vanity domain

Kehtib: Skype for Business 2015Microsoft Lync 2013

This issue occurs when the domain name of the SIP user is registered as an Organizational ID (OrgID) and Microsoft account (MSA) domain.


To fix this issue, install the April 4, 2017, update (KB3178731) for Microsoft Skype for Business 2015 (Lync 2013).

Note Lync 2013 was upgraded to Skype for Business in April 2015.