Update how-to-connect-staged-rollout.md

[jpettere]

Add Azure MFA as a feature option for staged rollout

[prmerger-automator[bot]]

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[jpettere]

Hey @billmath. We recently publicly announced the deprecation of MFA Server which formally started a 2 year countdown for customers to migrate to Azure MFA. We've got a whole doc that walks through the process (below), including the staged rollout bit, but I wanted to make sure the SR docs have some mention of Azure MFA too. LMK if you have any questions.

https://learn.microsoft.com/en-us/azure/active-directory/authentication/how-to-mfa-server-migration-utility

[opbld30]

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[Court72]

@billmath

Can you review the proposed changes? IMPORTANT: When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

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

[billmath]

#sign-off