@Daniel F Thank you for reaching out to us, As I understand you looking to get more details on this message "TargetObjectActionDisabled" which appears during provisioning.
TargetObjectActionDisabled - It's not really an error, the provisioning engine trying to look for a matching identity in the target but since it doesn't find one, it tries to create a new one. Since the Add option is disable under attribute mapping section hence, we skip the action.
TargetObjectAction being referred to can be found under the attribute mappings area and controls what actions AAD/Entra ID is allowed to take on the target, ensure create/update is selected.
Refer to this how application provisioning works - https://learn.microsoft.com/en-us/entra/identity/app-provisioning/how-provisioning-works#:~:text=Provisioning%20cycles%3A%20Initial%20and%20incremental
Let me know if you have any further questions, feel free to post back.
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