Excuse me, what do you mean "sync updated emails from Outlook machines to outdated backup VM"?
Maybe use tool like "imapsync" to sync?
I have approximately 300 email accounts on 300 computers. The emails that are in Outlook are the ones I want, since the ones on the server are out of date due to the restored backup of last week. I did a test on my machine, with the server turned on, when opening Outlook the most updated emails are automatically deleted because they are not on the outdated server. I need him to understand that the emails on these 300 machines are the ones I need and want to send to the server and not that the server goes out.
I did not get to use "imapsync" since I have the risk that when opening Outlook emails will be deleted and these computers are in several places.
When i mean Outlook, is a Microsoft program, not in outlook.com