I would say about 75% of my communications these days are through Slack and Teams, and I never have a problem with it.
But if someone like Slack/Salesforce or AWS could come up with a alternative (no bugs) for Exchange (dont say Gsuite), I would be happy...
O365 can be a bitch when migrating old Exchange servers. "You want 2000 new users with mailboxes? well, the best I can do is 1994 + 6 mail contacts hiding as ative users - the rest you have to spend 6 days trying to figure out why your msExchMailboxGUID will fuck the entire setup, and you have to recreate the Azure AD tenant"
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