Thank you so much.
It worked like magic!!!!
Have you put a check of Depth in your plugin code?
If not then put one line code just after checking the target etc.
Please mark the answer as verified if it is useful to you
In order to qualify the lead, you need to verify that there should be two buttons to Qualify - ConvertLeadQuick, ConvertLeadQuick.Web.
The Qualify ribbon in Ribbon workbench is named as "ConvertLeadQuick".
We could find its ID in F12 develop tools in browser.
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