Hi @sumonab999459, We have a similar thread on the issue you have posted. Here's the URL to that thread: https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/campaign-adobe-io-rest-api-not-able-to-set-organizational-unit/qaq-p/237577 The conversation here might help in resolving your issue. Please let us know if you have more questions.Regards, Sukrity