I’m sometimes asked about the number of simultaneous logins per user for Skype for Business Online. We know for on premises we can configure Set-CsRegistrarConfiguration -MaxEndpointsPerUser, which has a default setting of 8. These settings are not available online as Microsoft controls the registrar servers on Office 365.
I’ve successfully tested 3 Cloud PBX endpoints per user on Polycom VVX310. I haven’t been able to find a documented limit for SfB Online. Does anyone know?