When you run Shared Line Appearance (SLA) related cmdlets (such as Get-CsSlaConfiguration) more than 20 times in a Microsoft Skype for Business Server 2015 environment, the cmdlets don't work. Additionally, you receive the following error message:
Endpoint failed to login
This issue occurs because you don't log off from the endpoint.
Article ID: 3141118 - Last Review: Mar 18, 2016 - Revision: 1
Skype for Business Server 2015