Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
When they promise to call, you have to ask for a specific date/time (short window, not all day).
When they miss the scheduled time, YOU CALL THEM!
It costs them nothing to NOT call you back,
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No one is confirming when they close a ticket that it really is fixed!
So, no one is "effectively" tracking their "success" rate.
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Wasting your time waiting for them to call back costs them nothing.
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Unless you are "big business", MS Support SUCKS!