I have a client migrating to the MS Office Communications server 2007 R2 and they want to have their existing custom message on hold program play to callers when placed on hold. I can't seem to find any documentation regarding message/music on hold capability. Has anyone succesfully done this? Can you point me to more information on the topic?

Hi,I suggest you write the post in our OCS forum to get help from OCS experts:http://social.microsoft.com/Forums/en/category/officecommunicationsserverIf you meet problem regarding Exchange unified messageing problem in the future, you could also write post in our UM forum:http://social.technet.microsoft.com/Forums/en-US/exchangesvrunifiedmessaging/threadsThanks,Elvis