I have got a weird situation which I finding difficult resolving. One of the tables in our unmanaged solution is now missing the New button on the ribbon bar. Ironically, we have had discussions within the project team about the best approach for hiding buttons: XRMToolBox Ribbon bar edits or custom security role. However, we have yet to agree on the approach. If we know what was done to hide the button, we could undo it!

I have loaded the table into a separate unmanaged solution then opened this in the XRMToolbox Ribbon editor and as you can
see there are no hidden ribbon buttons ..

I have also looked at my security access (sys admin) in relation to the table

So I am bit of a loss as to what do do next😕 other than recreate the table