I did a search and saw that similar question was asked various times. However, it did not applied in my scenario. I am having a Cisco Telepresence VCS Expressway starter pack running on X6.1 firmware.
I was login to my Movi account and saw "User 1" is online under my favourite list. When I tried connecting to "User 1", I got the error "Call failed - The user could not be found. The user is offline or does not exist" (User 1 was never online).
I logout my Movi accounrt and login again. This time round, "User 1" is offline.
The other time was "User 2" saw "User 3" was in Busy status but "User 3" was never online. User 2's PC was rebooted and re-login into Movi and saw User 3 offline.
I addition to what Magnus has pointed out i would like you to check the bug "CSCtt34812".
The condition you were saying could be related to bug mentioned where the MOVI after deregistering doesn't publish its OFFLINE status and shows online. I can't say much but it would be more clear with logs.
workaround: Change the Default Zone's authentication policy from "Do Not Check Credentials" to "Treat As Authenticated"
for more details refer to Cisco BUG tool kit and check the release notes for Cisco Jabber 4.3
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...