Hi there,
We're in the middle of a cutover from an old domain to a brand new domain. We've built an Office 365 environment that is synchronized with the NEW domain's AD. I'm now trying to figure out the best way to migrate all mailbox contents from the OLD domain running Exchange 2003 when directory synchronization isn't an option. Ideally in a method that will allow us to leave some old user mailboxes behind. Public DNS has been updated such that inbound e-mail has already be redirected to 365.
IMAP wouldn't be a valid method as it won't migrate things like contacts, calendars and even sub-folders from what I can tell.
I'm dreading the idea of an exmerge to pst, then importing PSTs through Outlook, but that's all that I can really think of right now. Any input would be greatly appreciated.
Thanks,
Neil