Hi, Have you tried with the new environment? I use https://make.powerapps.com/ (or https://make.preview.powerapps.com/ if you would like to see a preview version). Anyway, I checked in my system and I haven't any relationship of an entity with an N:N relation. You could add a grid where you can manage that relation. You have to define entity related in the grid, and there you have N:N entity related. When you use the form from a register as a user, you could aggregate (or quit) a new relation between the register and other register of the other entity with the N:N relation. It will create a new register in the hidden N:N entity with both id's to establish its relation (for example: {0ca6b472-af75-eb11-a812-000d3ac27d15},{075d56b2-3ecf-eb11-bacc-002248821bf4} ). You could see that register in the Manage N:N Relationships tool of the XRMToolBox (or any tool to access N:N entity).
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