Adding Js add-in to Custom Ribbon Tab created by VSTO add-in

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Is it possible to add new Js Add-in buttons to our old Custom Ribbon created by VSTO add-in. From what i have read and tried it should work as it worked on standard tabs. Also is it possible to add it to existing group tried so far hasn't worked.

Thanks in advance Manoj

1 Answers

no this is not supported. you can only add commands to a brand new tab or any existing OOB tab.

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