Hi, Recently we had to recover our Exchange Server from a disaster. During the rebuilding of the new Exchange Server, the DST patch was not installed. We need to install the DST patch. Last fall when we applied the patch, we had to fix the Send As permissions on the mailboxes that had Blackberry devices associated with them. We would like to know if we install the DST patch on our new Exchange Server, will we have to fix the Send As permission again for our Blackberry devices?

Review this: http://support.microsoft.com/kb/912918 I don't believe the DST patch had anything to do with send as permissions. Mainly SP2 caused the change that required the send as permissions to be applied for Blackberry service accounts.

Your assumption was correct. The "Send As" permission was not changed. Doug