There could be 2 reasons why your email has been "blocked".

1. Have you logged in to your email and seen this message? 

More than likely you accidentally denied your MFA (authenticator app request) when signing into something previously.

Please submit a ticket to Help@UTulsa.edu along with a screenshot of the error.

2. Did you get a new phone recently?

If you got a new phone, you'll need to have your authenticator reset by IT. 

But what can you do to expedite that? Please go into the Microsoft Authenticator app and make sure you have no "entries" in it  (aka your email). You'll only want to see that blue "add account" button.

Then Call 918 631 3500 or email Help@utulsa.edu.