OK, so you just got your shiny new Office Communications Server (OCS) 2007 (R1 or R2) implementation up and running, and whoa!, you start receiving complaints that users are unable to initiate multiparty instant messaging (IM) sessions, or multi-party conferences.

The setup:

OCS 2007 R1 and R2 (Standard)

Cisco Unified Presence Server v7.0.2

Cisco Call Manager v7.0.1.11000-2

In OCS 2007, the error reads as:

“Your attempt to start a conference was unsuccessful. If you need further assistance, contact your system administrator.”

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