Samsung not syncing calendar or contacts

"Robert T. Repko" <[email protected]>
Newsgroups gmane.mail.cgatepro.general
Message-ID <[email protected]> 
I have a Samsung SM-G870A running android 5.0
Connecting to CGP 6.0.5 on Windows Server
 
The calendar and contacts no longer sync with the server.  Is this a known problem or is there a configuration setting I'm missing.  The calendar and contacts use to sync but stopped several weeks ago.  Thanks for any help/ideas.
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