Issue
A pop up similar to the following is displaying when attempting to Grant Access to a Cloud Storage Account on an Email Import job.
This pop up generates if an organization requires multi-factor authentication for Outlook logins.
Resolution
Instruct users to follow these steps:
Click this Microsoft link: https://aka.ms/mysecurityinfo
Once there, log in with your email address.
Configure a multi-factor authentication method.
Once the multifactor authentication is set up, you should be able to complete the process of granting access and adding a source.