How old are your Macs? Assuming they have 10.13.2 or greater, using a QuickAdd.pkg to enroll is not a recommended approach due to User-Approved MDM, since the User would still have to go in to System Preferences -> Profiles and approve the MDM profile.

I assume you are trying to make this as frictionless for the end user as possible, but they are going to have to be involved in the process somehow.

A couple of ideas off the top of my heads:

1) Once you remove Intune as the MDM, open an enrollment web page for the user and have them enroll via User-Initiated enrollment in to Jamf.

2) If you devices are in ABM, you could create a Pre-Stage Enrollment in Jamf and move the computers to this Pre-Stage. In your scripts run the command sudo profiles renew -type enrollment and have the user enroll. (Note: I have not personally used this method, only seen it mentioned online.)

I haven't done a specific migration, I usually just wipe and re-enroll. But, hopefully this will give you some ideas. Of course, test heavily.

Most of them are fairly new and running Mojave or higher. I'm thinking the profile command will likely be better than the quickadd. Trick is just getting people to click the banner.

UMAD may help wrangle users to enroll with Jamf

Cool, thanks for the link, I'll have to look at this. I'm already using one of Erik's other project so should be pretty easy to setup.