As long as you verify that the associated A DNS record(s) are updated correctly then you should be okay. Depending on whether you are traversing firewalls and if the new IP addresses is in the same range/subnetwork you may have routing related issues, but OCS doesn't hardcode an IP addresses. You'll probably want to restart all OCS services afterwards, or simply reboot the servers to verify that any DNS cache is purged. Using the command "ipconfig /flushdns" on each server and force this, but depending on AD replication or DNS zone transfers the A record change could take some time.Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
Proposed as answer byJRWhiteheadTuesday, March 3, 2009 10:27 AM