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jetli87

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Skype for Business 2015 and Exchange 2016 UM integration not working for single user

Skype for Business 2015 and Exchange 2016 integration/on-premise infrastructure.  Had upgraded from Lync 2010 and Exchange 2010 about 6 months ago and everything has been running smoothly.  But recently, there's 1 user out of 70 that has an issue with Skype and Exchange Unified messaging integration.  Basically, his Skype client can't properly connect to Exchange UM and thus, UM features from Skype for Biz Client are not present, i.e. call history, check/change vmail, and Calendar feed.  When checking the Skype Config Info, it shows "UCS Connection state = Exchange Connection Down" and "EWS Information = EWS not deployed".

I've tried enabling/disabling UM via EAC, running mailbox repair, and even moving the mailbox to another DB, but the issue still persists and there's no error of any kind on the event logs on exchange and skype servers.   The user's UM still works fine within Outlook.

At this point, i'm stuck and need so guidance.
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jetli87

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