Hi Guys
As per the subject and mostly for me/you as well, when working with Exchange Unified Messaging and certain models of phones you might have issues with a fast busy tone when trying to check the voicemail.
Easy answer to this: you are probably enabled for Video, for some reason if you try and negotiate a video codec with Exchange 2010 it will fast busy on you, so either disable video on the phone OR create a region for the Exchange UM SIP trunk so that it doesn't use video.
Awesome Peter. Found this problem a few months ago when 9.2 for my 9971 came out but never had time to capture and look for myself. I'll make that region tomorrow.
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