Just a couple of notes as to my experience running the Exchange rebasing tool in my lab environment.
-Forget manually editing the ini, what a pain.. run the msextmzcfg.exe util instead.
-Got many mailboxes showing up in the errors.txt file. Had to open up mailboxes_1.txt in Excel, and add all mailboxes from errors.txt (with the correct time zone values).
-Full mailboxes caused issues with the meeting updates not getting to all the invitees. Need to check user mailbox limits and adjust beforehand, at least for VP calendars..
-In the case of a delegate PC that handles meeting invites to confernce room calendars, it declined many meeting updates due to meeting conflicts. Need to set the conference room calendars to accept conflicting meetings before kicking off the rebasing, then turn it back off when done.
- As for "send as" permissions, we opted to set AD "send as" perms to user objects at the OU level for the user running the Exchange rebasing tool, and that seemed to work just fine. Can always remove the perm after we're done if desired.
Time to restore the lab Exchange server and run another rebasing test...
Also, what's this I hear about MS giving out the E2K DST fixes for free if one complains loud enough?? Must just be rumor, although it would be the right thing for MS to do.... and no loud complaining should be needed either... If they are going to do it, they'd better do it soon else they'll have that many more refunds to hand out to those who ponied up the $4K.