Hi @Tee Nhek ,
Agree with andy. According to below document, the security issue has been solved in the latest security update
You need to install the CU22 and the latest security.
Download Exchange CU22 from here.
https://www.microsoft.com/download/details.aspx?familyID=a7d608a2-d81b-46af-8753-8c3c2ea1f783
The latest SU March 8, 2022 (KB5012698)
Description of the security update for Microsoft Exchange Server 2019 and 2016: March 8, 2022 (KB5012698)
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