Update multi-factor-authentication-enforcement.md

[tarosler]

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[Court72]

@dcurwin

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[tarosler]

#sign-off

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @dcurwin

[dcurwin]

#sign-off