This patch will reset SendAs permissions again, just like the previous Exchange services packs and some updates have done. I use the VBScript AddSendAs.vbs from the Microsoft KB 912918. I have attached it to this e-mail and it is on the bottom of the KB. The syntax is simple:
To export users who have Full Mailbox Access without the Send As permission for a domain, enter the following command:
CSCRIPT AddSendAs.vbs [domain controller name] –Export
Edit the file as necessary.
To import an edited Export file, enter the following command:
CSCRIPT AddSendAs.vbs [domain controller name] –Import [filename]
In my situation I just needed to apply the Send As permission to all of the results from the export. See below for those instructions. YMMV please read the notes from the KB article:
To grant the Send As permission respectively for each mailbox in the domain for all users who already have the Full Mailbox Access permission for a mailbox:
CSCRIPT AddSendAs.vbs [domain controller name] –SetAll
The patch was run from the BES server (which is a Domain Controller) on a domain admin account. The server has Exchange Management Tools installed. That account is also an Exchange Administrator. YMMV but this is what worked for me.
Rename AddSendAs.txt to AddSendAs.vbs