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Exchange AMA

Event Ended
Wednesday, May 10, 2023, 09:00 AM PDT
In-Person

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We are excited to announce an Exchange AMA on Wednesday, May 10th at 9:00 AM Pacific time!   On March 23, 2023, Microsoft announced a new transport-based enforcement system in Exchange Online tha...
Meenah_Khosraw
Updated May 10, 2023
exchange online
duzsb's avatar
duzsb
Copper Contributor
May 10, 2023
Will this block e-mails from external Exchange servers as well? For example: a customer has on-prem Exch 2010 which sends e-mail directly outbound and his/her customer using EXO.
ScottSchnoll's avatar
ScottSchnoll
Former Employee
May 10, 2023
Yes, eventually those servers will be in scope, too. Exchange 2010 is unsupported and should no longer be used.
  • Eriq_VanBibber's avatar
    Eriq_VanBibber
    Brass Contributor
    May 10, 2023
    Well, that seems counter to my similar question yesterday. I thought the tracking was only between tenant related servers (e.g. my on-prem server sending to my tenant)?
    • ScottSchnoll's avatar
      ScottSchnoll
      Former Employee
      May 10, 2023
      No; it does not matter who in Exchange Online is the recipient. We're blocking messages from persistently vulnerable Exchange Servers no matter who they are sent to.
      • Eriq_VanBibber's avatar
        Eriq_VanBibber
        Brass Contributor
        May 10, 2023

        Ok. I think some strong clarity is needed here. My takeaways are:

        1. Initially, Ex2007 servers tied to a tenant (attribution, as you mentioned yesterday) will be first.

        2. Ex2010 server tied to a tenant next.

        3. Ex2013 next

        4. Ex2016, Ex2019 and (i suppose) Ex2025, next.

        5. Non-hybrid connections

        6. All Exchange servers that connect directly to O365 (regardless of tenant relationship)

        7. All Exchange servers direct or indirect (thru gateways).

         

        Correct me where i'm wrong please.

Date and Time
May 10, 20239:00 AM - 10:00 AM PDT