Hi,
I am having an issue with adding a custom ribbon button on an Activity view. Ideally we need the button to appear either when viewing a list of Activities (entity=activitypointer) or a list of Letters (entity=letter), and then only be visible when one or more Letters are selected.
We have tried several things:
1. Using Ribbon Workbench, add a button to either the 'activitypointer' entity or the 'letter' entity - in both cases, the button just doesn't appear on the toolbar.
2. Using Power Apps command designer, add a Command to the Activities table main grid command bar - in this case, the button appears, but then disappears as soon as a record is selected.
Other articles say you must add an Enable Rule, but in this case, the button doesn't appear in Ribbon Workbench nor in customizations.xml - without that, we don't see how to add an Enable Rule, nor the needed visibility rules.
Has anyone done this successfully, and any pointers on how to do this?