I have a client where we are changing email providers to Outlook in Office 365. The existing email is set up as IMAP. In Outlook, I exported the IMAP emails to a PST, deleted the account, created the new Hosted Exchange account in Outlook 2016, and then imported the saved PST file into Exchange. Initially, all the IMAP emails were hidden, but I researched that and found how to adjust the view and IMAP filter to show all emails, including the imported IMAP emails, and all seemed fine. However, I now see that the imported IMAP emails, although showing up in Outlook, do not sync, do not show in OWA, and are not imported into the Exchange account set up in their phones.
I'm assuming these emails are still marked as IMAP files and are not 'syncable' in Exchange. If this is the case, how do I make them sync and behave just like files created in Exchange?
I'm really surprised at he complexity of converting an IMAP account into Exchange. It seems to me the conversion process should be much easier, faster, and more automated than it is. But at this point, we're almost done, and I just need to get those imported emails syncing properly. Any suggestions?