For it to be visible in the Custom section of the Patch Policy, you need to make sure the Fixlet has a default action and has been associated with the Patch Management domain.
If you’re working with a custom copy of the Restart Needed fixlet, you’ll need to export it and modify the
<Action> tag to be a
Set the domain to be Patch Management when you import the Fixlet XML.
Be sure and test this approach before you deploy it to anything career limiting…