Exchange on-prem stamping wrong build number onto message sent via Pickup folder

Mark Beckingham 0 Reputation points
2024-10-25T07:49:30.6333333+00:00

Exchange online is throttling then failing emails sent via Exchange 2016 pickup folder under the error {LED=550 5.7.230 Connecting Exchange server version is out-of-date; connection to Exchange Online blocked for 60 mins/hr.

Exchange 2016 server on-prem is fully up to date, doesn't appear on "Out-of-date connecting on-premises Exchange servers" & emails sent via traditional relay are being delivered to Exchange online without issue.

Anyone know how to resolve the issue where Exchange on-prem server is stamping wrong build number onto message sent via Pickup folder?

Exchange | Exchange Server | Other
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  1. Nino Bilic 10 Reputation points Microsoft Employee
    2024-10-25T13:13:06.4333333+00:00

    We are aware of this problem, and it will be addressed in an upcoming update. EDIT: now released: https://techcommunity.microsoft.com/blog/exchange/released-november-2024-exchange-server-security-updates/4293125


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