[cisco-voip] Strange EM behaviour

[Lemon]

hi,

running cucm 6.1.1.2000-3 for a while now with no major issues.
suddenly today we noticed that when users try to log out or log into
phones with extension mobility it says "requesting" and this takes
forever t oeventually bring up the login page on the phone. Same
applies for when users try to use "hlog" for hunt groups and
callforward from their phones.

Anywhere specific I should look at?

thnx
charl