Can't switch back to infopath form after publishing a powerapps form

Hello DominicWill1,

When you publish a custom PowerApps form for a SharePoint list, it overrides the previous form settings, including the option to use a custom InfoPath form. In this case, if the "Use custom InfoPath form" button is grayed out and inaccessible, it indicates that the ability to switch back to an InfoPath form has been disabled.

To address this situation and revert back to the InfoPath form, you have a few options:

1. Delete the PowerApps form and republish the InfoPath form: If the errors in your PowerApps form are preventing its use, you can delete the PowerApps form and republish the InfoPath form. After deleting the PowerApps form, the option to use a custom InfoPath form should become available again. However, note that this approach permanently removes the PowerApps form and any changes made to it.

2. Create a new SharePoint list and attach the InfoPath form: If you have a backup or a copy of the InfoPath form, you can create a new SharePoint list and attach the InfoPath form to it. This allows you to use the InfoPath form without being affected by the changes made in the existing list.

3. Contact Microsoft Support: If the above options don't work or if you need assistance with specific issues related to your SharePoint list and forms, it is advisable to contact Microsoft Support. They can provide guidance and potential solutions to help resolve the situation and revert back to using the InfoPath form.
   
   Hope it helps.
   
   Kindest regards
   
   Leon Pavesic