Neither. Install the new OS in the new hardware, and then migrate your workload.


After a bit of playing around I managed to figure it out - details below for anyone who comes across this (presuming your postfix and dovecot is set-up as detailed above - which was setup as per https://www.binarytides.com/install-postfix-dovecot-debian/). Add the domain to be migrated to /etc/postfix/virtual_mailbox_domains Add the users to be migrated to ...


It’s a complex move. Activate successful account logon auditing into your OLDCO Domain Controler. In the security log you will see all login attempt made against the DC after, thus at the end you will see if something still authenticate against it, as the credential are not cached from your NEWCO Domain Controller. Be advised it can create a lot of log. Be ...

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