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Chris Hill's avatar
Chris Hill
Copper Contributor
Nov 12, 2018
Solved

Enable MFA and Ensure all users registered for MFA actions include shared mailboxes in Secure Secure

I am using Secure Score and attempting to complete actions in order to secure my Office 365 environment.

 

It is not possible to require Multi-Factor Authentication for Office 365 Shared Mailboxes as I believe they do not have a username & password, but my Shared Accounts are included in the total reported by the 'Enable MFA for users' and 'Ensure all users are registered for multi-factor authentication' actions in Secure Score.

 

Please could you confirm that not having Multi-Factor Authentication enabled on *shared* mailboxes is not risky, and remove them from the Secure Score rules totals?

  • Chris Hill's avatar
    Chris Hill
    Nov 14, 2018
    Of course - if the tool excluded objects that don't need MFA though, it would be possible to check that no accounts which *should* have MFA are missing. Given Microsoft seem to be putting this forward as a compliance tool, it shouldn't be responsible for false positives if at all possible!

4 Replies

  • Munesh17's avatar
    Munesh17
    Copper Contributor

    Chris Hill Hello Chris,

     

    Am stuck at a simillar cross road. I want to enable MFA for shared mailbox. Did you get you way out with a solution. 

    Look forward for your reply.

     

    Thanks

    Munesh

  • Chris Hill's avatar
    Chris Hill
    Copper Contributor
    I should add - I believe Resource (Room and Equipment) Mailboxes are also counted, and these need to be excluded as well (since they do not support any form of logon, let alone multi-factor).
    • VasilMichev's avatar
      VasilMichev
      MVP

      They do actually have user accounts, but there is no risk involved in not having those protected by MFA. Remember, the secure score is only suggesting some generic best practices/recommendation, Microsoft cannot possibly account for all the different controls and configurations tenants have, so always read the score and the actual recommendation in the context of your own requirements.

       

      I do agree though, shared/resource mailboxes and any similar object types should be excluded by default.

      • Chris Hill's avatar
        Chris Hill
        Copper Contributor
        Of course - if the tool excluded objects that don't need MFA though, it would be possible to check that no accounts which *should* have MFA are missing. Given Microsoft seem to be putting this forward as a compliance tool, it shouldn't be responsible for false positives if at all possible!

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