A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
Also, do a search on red dit (yes I know that's not how it's spelled) for contacting data protection team and there is a great article you'll find there by a Joey Verlinden or something like that.
They also told me: Here's what I've learned about getting a business account back online:
Call 800-642-7676. State that it's a business account. For the problem, say the words "Global Admin Locked Out Data Protection". You are then forwarded to the Data Protection hold queue for anywhere from a few minutes to a few hours.
How long you're on hold has to do with how long your ticket has been open, and how often you call. The more you call, the longer you sit on hold. If you're holding for over an hour, try calling from different phone numbers. This is a game to make you suffer as much as possible, especially if you get impatient. Ha! Ha! (that's what it felt like sometimes) Once connected, use only one number for all callback requests. Be consistent on your contact email address as well.
You want the Azure part of Microsoft. when you email or call get it make sure you say this:
Can you escalate this to a P1 ticket/case please? This is critical to my business and my business is completely shut down right now with high financial impact.
My case number: _____
My name: _______
My domain/email: ___
My telephone number (USA – East Coast time): (1) don't forget to put the (1) if you're in the US!
Alternative telephone number: (1) ____ (one person said don't, but I did)
My alternate email address: ____the email address that works! At first they had the email in there that didn't work!