According to Peter Villadsen (Many thanks to team 
) :
The team is excited to announce that RSAT 2.8 is now released and available here: https://www.microsoft.com/en-us/download/details.aspx?id=573….
This release has added several new features and some stability improvements throughout. However, the main contribution in this release is the availability of new, more secure Entra based certificate-based authentication mechanisms.
The release is designed to be a drop-in replacement for RSAT version 2.7. Moving to this new version will not require changes to your tests.
See details at this Yammer site: (123) Viva Engage : Dynamics 365 and Power Platform Preview Programs : View Conversation
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