Recently when trying to customise a list form with “Customize Form” I came across the following error:


The trick to resolving this was the message “Customizing the form for this content type is not supported”.  I was using a content type on the list which was pushed down from a centralised content type hub.

To resolve:

  • List settings
  • Select the custom content type you have attached
  • Advanced settings
  • Set “Should this content type be read only” to No

Now you should be able to edit the list form(s) in InfoPath.


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