X-MS-Exchange-Organization-BCC header isn't encoded correctly in Exchange Server 2019 and 2016

Applies to: Exchange Server 2019Exchange Server 2016


Consider the following scenario in Microsoft Exchange Server 2019 or Exchange Server 2016:
  • A user has Non-ASCII characters such as Japanese characters in the display name.
  • You create a journal rule to send a journal message to an external recipient.
  • You send an email and add the user in the BCC field.
In this scenario, the journal message's embedded message has the mail header X-MS-Exchange-Organization-BCC and its value contains Non-ASCII text.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. 


To fix this issue, install one of the following updates:
For Exchange Server 2019, install the Cumulative Update 1 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019.
For Exchange Server 2016, install the Cumulative Update 12 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.


Learn about the terminology that Microsoft uses to describe software updates.