ISSUE: cannot sign into communicator because your computer clock is not setup correctly !!! WHY? This issue arise when lync server's directory control ( DC ) clock time is not match up with Lync Client 's pc clock time. SOLUTION: The easy solution is that to make sure that the Lync DC system time is maximum 5 minute different then Client's PC time. The smart solution is -- STEP 1. Goto client pc's adjust date and time . STEP 2. Then on Date and Time window select Internet Time tab. STEP 3. Now click on Change settings.. a new pop-up named Internet Time Settings will arise. STEP 4. On Server text field set the Lync DC / active directory IP address and click update now . STEP 5. Now you will get DC system time and set it by clicking OK .
Network programming and scalable micro-services in Azure