OCS 2007 R2 Bug

Seems there is a bug in OCS 2007 R2 that makes the edge server behave strangely. You will fail validation, and you might also get a “Limited External calling” message in the OC client.

The solution is posted here:

http://unified-communications.blogspot.com/2009/01/ocs-2007-r2-and-localization.html