Sign out of All 365 Apps
This article is one of the solutions to constant lockouts not caused by the account's owner attempting too many incorrect guesses on their password.
You will be using a setting every owner of a 365 account has available to them, called "Sign out everywhere." This will simply sign your account out of all instances of 365 apps you might be signed in to, regardless of what device it is on. With that being said, after completing these instructions, you will have to sign into these apps at least once per device.
1.) Sign in to https://myaccount.microsoft.com using your Rockhurst Email and Password.
2.) In the lower left of the center panes, there will be a "Sign out everywhere" option. Click this link.

This option forces all instances of your 365 account to sign out. You will have to re-login when you go to any 365 application and Teams.