What is likely causing the connection issue?

You are the Microsoft Lync Online administrator for your company. A customer has reported an issue when signing in to the company’s Lync Online Service. When the customer attempts to sign in, the following error message is returned: “The server is temporarily unavailable”. The server is up, and other customers are connected to it.

What is likely causing the connection issue?
A . The user has the incorrect Lync version
B . The user has entered the wrong user name
C . DNS is configured incorrectly
D . The user does not have a Lync license

View Answer

Answer: D

Explanation:

This issue occurs for one of the following reasons:

Cause 1: You are not entitled for Lync Online.

Cause 2: You lack connectivity to the Lync Online service.

Cause 3: You are running a 64-bit Windows operating system.

Reference: "Cannot sign in because the server is temporarily unavailable" error when you try to sign in to Lync Online in Office 365 dedicated

https://support.microsoft.com/en-us/kb/2619522