Ms. ArmoredThirteen

In the past when I’ve had to migrate emails I’ll set up automatic forwarding for anything important like that. Then switch the services you can. Idk if something like that could work for you and it is admittedly a bit of a pain to keep track of. Could limit MS influence on your stuff though

Like half of my job is writing .bat files to automate stuff locally and not tell my boss that all I do anymore is double click the right things in the right order…