We have a Trio8800, and there is a problem in connecting to certain conferences. One thing that they have in common is that the meetings are sent by someone else. The meeting are sent from a SFB account, so that shoudn't be the problem.
What might be the problem?
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You mention this is a forwarded Invite. Is this from the same organisation or a different organisation? I suggest you check if the TNEF information is still included within the meeting.
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