OMG. It's an absolute pile of crap on fire. Not just teams - Exchange/Outlook is as bad.

Last year we had Mac users start to report "when I attach a file, it looks like it's sent, but then recipient never sees it, and sent-emails doesn't show it either!" It got worse and worse.

This is kind of a problem in a business that sends and reviews a lot of documents. I spent two months on countless calls with MS, repeatedly capturing videos they requested, etc.

Finally, I happened to come across an advisory that hey, Outlook for Mac is broken, and will "eat" attachments. Dated a week before we started to see the problem. Firstly, it took them MONTHS to get it resolved as it required significant updates to Exchange. Secondly, in all the interactions I had to have with their support team: they had NO IDEA. Worse than useless.

And no one can say what exactly.

What has broken about using any of o365?

These are some I had over the last few months actually;

"I can't save outside of onedrive"

"My mails aren't getting delivered"

"My office suite has deactivated itself and won't reactivate"

"We need a shared mailbox for x,y,z"

"The new joiner can't access my onedrive/shared drive" (No groups/auto-groups - they require some more advanced administration or discipline).

"I received an email from someone impersonating the CEO asking for an invoice to be paid immediately"

"My Excel sheet is somehow not syncing to onedrive and now there's conflicts"

FD: We don't use Teams, and we migrated from o365 to GSuite, but there are some people who remain on o365 for Office reasons.

This list is a good summary. We have a lot of issues with logging in and two factor. Initial login and setup is particularly fraught.

And Teams. Everything. My personal favourite is document format screw ups (‘corruption’ might be the right word) depending on which Word was used (app, browser, Teams Word). It’s such a shit product. Document footer problems and page numbering issues are a complete waste of my time.

Spending the first 10 minutes of every call trying to get sound working for everyone. Hey Teams, don’t switch what mic you are using.

Teams won’t display any usernames for an external company that added to me their chat, everyone is Unknown. Maybe misconfig, something to do with cross domain permissions, but it feels buggy and broke.

Excel has some funk around keeping shared files in sync. We set up one spreadsheet where I have read only access so I don’t accidentally delete anything. Turns out when I do make a change, excel creates a locally cached version and stops syncing changes. That took a couple hours of screwing around to figure out, and the solution was to duplicate the spreadsheet with a new name and delete the old one.

For teams there was a month where every single call it would lag out for 5+ seconds every minute or more. Just completely unusable.