Before You Begin
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Before you start adding a new Microsoft Office 365 organization with enabled multi-factor authentication (MFA), you must register a new Azure AD application in your Microsoft Azure Active Directory.
You will be required to provide connection settings to this application at the Specify Azure AD Application Credentials step. Such an application is used for establishing and maintaining a connection to your Office 365 organizations and to perform a backup and restore from/to such organizations.
Make sure to grant your AD application required permissions.