As proposed by Hans Verduyckt in Exchange Online Virtual team meeting 12/03/2019:


Proposed change:  set standard OwaMailboxPolicy value OutlookBetaToggleEnabled to False so users can not use "outlook preview"


Thomas Jadot & Didier Van Reeth approved this proposal with the following remarks:


- change the "OwaMailboxPolicy-Default" value OutlookBetaToggleEnabled to False

- create extra "OwaMailboxPolicy-test" with this option available for test purposes  



status: tested OK - to be planned


DONE 18/03/2019