I have had a situation where in I had to log out one user off extension mobility and found a way..I know this is old but might help someone.. Go to Device> phone > Actively logged in device on top drop down (I'm sure you know this) look up for the phone with your profile logged in either with profile name or directry number. Once you found the phone the rest is simple. Goto the phone page scroll down and find Extension information. Under that you will find log out profile, find your profile and click log out. Few seconds and done.
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