In addition to the final Exchange 5.5 migration
tasks you must perform, the following tasks must be performed
by mailbox users after you run Migration Wizard:
Remote access users must delete offline folder files (.ost)
before they re-create their profiles.
Users must delete schedule files (.scd) before they re-create
their profiles.
Users must re-create their profile and specify their new
mailbox name. They must not copy or edit the original profile.
Users can encrypt the messages that they decrypted prior to the
migration process.
Users who have rules based on mailbox name, private folders, or
public folders must re-create them after the migration
process.
After you regenerate the offline address books, users can
download them.
Users must update entries in their personal address books
containing users not migrated to the same Exchange 2000
organization. Users do not need to update personal address book
entries for users whose mailboxes were migrated to the same
Exchange 2000 organization.
Users must reestablish additional folder permissions.