So, as I understand it, during coexistence, Outlook "Room Finder" does not work while the rooms/resources are still in Domino, and only Contact objects are in O365. This is "by design" (https://support.quest.com/coexistence-manager-for-notes/kb/214076/room-finder-in-outlook-is-unable-to-see-domino-rooms-and-resources).
Another Quest article suggests that the best practice is to migrate the resources from Domino to Exchange once 51% of the mailboxes are moved to Exchange.
I am wondering how the coexistence performance would work if we migrated our resources BEFORE we migrate any mailboxes? Does the Lotus Notes "Find Rooms" and "find Available Times" feature still work if the resources are fully in Exchange? Is there any loss of functionality our Lotus Notes users would find if the resources are moved to Exchange first?