Hello everyone!
I'm having a curious issue with a subgrid on one of our records. The subgrid is located on a "Shipment" record, and contains Email activity records regarding that particular shipment. The 'Create' icon is present, but the Associated Records icon is not.
The Shipment entity has the proper 1:N relationship to the Email entity:
However, Email does not appear in the Relationship Explorer on the Form editor, so I can't add it the the Navigation. I've noticed this is a similar issue to Tasks as well.