Dialin Conference number not working

Long time no blog. A lot of Lync projects recently, thought I might just share an experience from one of them.

The other day I was working on a migration project from OCS 2007R2 to Lync Server 2010. Everything went smooth, customer was moved to new pool and the modalities were working out, as well as the customer’s long sought-after Lync Mobile client.

Even Enterprise Voice, routed through the OCS Mediation at the time, was working as intended. Then we published a new topology with a PSTN gateway going from Lync to their existing PBX – still success on outgoing calls. And then, at last, dialin conferencing was moved (Application Endpoint) from OCS to Lync – nothing…

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