Foreign language characters set in RejectMessageReasonText of a transport rule aren't shown correctly in Exchange Server 2019 and 2016

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Applies To

Exchange Server 2019 Exchange Server 2016

Symptoms

For a custom non-delivery report (also known as an NDR or bounce message) in Microsoft Exchange Server 2019 or Exchange Server 2016, the foreign language characters set in the RejectMessageReasonText parameter of a transport rule aren't displayed correctly.

Resolution

To fix this issue, install one of the following updates:

For Exchange Server 2019, install the Cumulative Update 6 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019.For Exchange Server 2016, install the Cumulative Update 17 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.