When Outlook and Communicator integrated with each other then only Outlook calendar meeting information will show on Communicator status. Like when meeting started Communicator status will show like In-Meeting.
If you are scheduling meeting via Outlook (Webex must be configure in outlook) then it will show your status.
In office communicator > click on main menu > tools > Options> General tab> In personal Information manager, Select Outlook, Out of Office etc.
Log off login on COmmunicator. wait for an hour and schedule Meeting via outlook and see.
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