Cannot join the meeting due to user permissions

The somewhat long title is also an exact error Message. A customer experienced that some external users were not able to join their scheduled Conferences. I tried myself, and was prompted With the same Message.

I remember having read Tommy Clarke’s blog ( on the problem some time ago, but at the time thought this only was related to Lync Server 2013 – and my customer runs a 2010 server.

Then I came across a blog post from Mika Seitsonen ( – English translation) pointing out the same problem that Applied for Lync Server 2010 as well.

Following the steps pointed out in their blogs the problem was fixed.


One thought on “Cannot join the meeting due to user permissions

  1. April Blog artikler fra Atea konsulenter –

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