Home » Tech » Microsoft Exchange Server suspends mail delivery due to date check problem (handling) (January 2, 2022) | BIGLOBE News

Microsoft Exchange Server suspends mail delivery due to date check problem (handling) (January 2, 2022) | BIGLOBE News


Microsoft’s “Exchange Server 2016” and “Exchange Server 2019” can no longer deliver emails after January 1st. Bleeping Computer reported that it was caused by a “2022” bug in the FIP-FS anti-malware scanning engine. Microsoft is aware of the issue on the same day and announced that it “will publish details of the solution later today.”
The problem is “related to the failure of the date check due to the switch to the New Year” and “not a security-related problem”.
According to security researcher Joseph Rosen, the cause is that Microsoft has set a maximum date value of 2,147,483,647 using signed int32. The minimum date for 2022 is above 2,201,010,001, which exceeds the maximum, causing the scan engine to crash and stack mail.

Microsoft says it will take several days to provide problem fixes that do not require customer work.
In the meantime, the customer can do a malware scan of email outside the Exchange server by bypassing or disabling the scan and clearing the transport queue. However, Microsoft warns that these workarounds should only be used if you have an email malware scanner other than the Exchange Server engine.

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