Hi,
We have the latest version of Lync 2013 Server and Exchange 2013.
On the 300 users we have one user where we have an issue. He has exclamation point near the Conversation/Meeting button. If we look at the Configuration Information, MAPI is status OK but the EWS Information is EWS unavailable; retrying.
On Lync Client 2013, we have the issue EWS unavailable
On Lync Client 2010, we have no issue, EWS is status OK
We tried to connect his account on several devices and on all devices we have the issue.
Thanks for your assistance