Cannot sign in to Lync because your computer clock is not set correctly - Lync 2013

Issues Noticed:

I have this error "Cannot sign in to Lync because your computer clock is not set correctly" when I try to connect to a Lync Server 2013 test environment.

All my servers and client machines have the correct date and time. The servers and external client machines are in different time zone.

No error or warning events on event viewer.

Common Instruction

Note: Domain user should be configured for installing Lync Software. Lync 2013 is working only on Windows 7. All of our friends are requested to upgrade / install Windows 7 or higher version for installing Lync Software.

Solution

• "Cannot sign in to Lync because your computer clock is not set correctly. To check your computer clock settings, open Date and Time in the Control Panel."

The system time or date is more than five minutes off from the time or date of the Lync server.  Verify that your computer's clock is set correctly.

The above said problem occurs if the time difference between India Post domain and local host is more than 5mins. Please adjust your local machine time as India Post domain time then login the same without above error.

Author : Admin, PoTools