I saw an option in the feature “Restore Virtual Servers” which is “Re-allocate UIDs and GID.”
If marked “No” to preserve the same IDs. the email client (Outlook) will do the re-download the messages?
Or this is not related to the re-download the messages.
And yes UIDLs Dovecot.
Migration is a backup to a new server without accounts.
Those aren’t related to the email message ID’s.
Whenever there is an account on a Linux system, that account has a user ID (UID) and group ID (GID) number associated with it.
The option you’re seeing specifies whether it should keep the same UID/GID, or whether it can generate new ones.
Newer Virtualmin versions should backup the various Dovecot control and index files, which should ensure that the messages aren’t re-downloaded. That feature was added a few months ago… if you’re using the most recent Virtualmin version you should be fine.
I will test it in the coming weeks.
If it works it will be very good.
I’m glad to hear that.