When Office 2019 availability was made available, it was also announced that it would be supported to be deployed using System Center Configuration Manager.
Microsoft has now released the following updated statement:
The Office 365 Client Installation wizard in Configuration Manager (Current Branch) currently doesn’t support Office 2019, including Project 2019 and Visio 2019. The product team is working on the changes needed to enable this and expect support for Office 2019 to be available by the end of the year.
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