conflicting information in MC266466

Sree 1,971 Reputation points
2021-10-21T12:32:10.37+00:00

Reviewing MC266466; I am seeing conflicting information.

In one aeticle, the issue is identified as impacting "We are introducing a new SRS parameter on outbound on-premises connectors".

However, the article also states "Our recommendation is that customers routing messages to the Internet via their on-premises servers should proactively enable the new setting on their connectors"

https://techcommunity.microsoft.com/t5/exchange-team-blog/sender-rewriting-scheme-upcoming-changes/ba-p/2632829

  1. Where should the change be made in Exchange Online or On premises servers. The settings mentions to update only exist in On Line Connectors?
  2. We do use Auto Forwarding from Sub Domains and Mail Flow Rules that Forward mail. It sounds like we should make the change. Is it right to make the change proactively?
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Accepted answer
  1. Andy David - MVP 142.3K Reputation points MVP
    2021-10-21T12:40:12.357+00:00

    Do you route outbound mail through Office 365 or on-prem?

    If all mail from 365 is routed to on-prem outbound, then set SenderRewritingEnabled on the connector from 365 to on-prem.

    1 person found this answer helpful.

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  1. Sree 1,971 Reputation points
    2021-10-21T15:55:32.63+00:00 
    We have a hybrid environment, so it would be both. 

That said, I should set Set-OutboundConnector value "SenderRewritingEnabled" to $True for Outbound Connectors to On-Premises?

Correct?


The only risk is if you don't enable it

Is that correct?
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  2. Andy David - MVP 142.3K Reputation points MVP
    2021-10-21T17:37:53.89+00:00

    There is no risk either way :)
    But if you are routing all 365 mail to your on-prem servers then out to the internet, set it on the outbound connector from 365 to On-prem.
    You dont set it on the connector from on-prem to 365.

    If you are sending outbound mail directly from 365, then no need to do this.

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