Hello vipin kumar Niranjan,Thanks for your question.
When a user is created in Microsoft Entra ID, a unique identifier is assigned to the user. This UID is typically the user's Object ID, which is a GUID.Query should be like:
GET /Users?filter=userName eq "Test_User_00aa00aa-bb11-cc22-dd33-44ee44ee44ee"
See:https://learn.microsoft.com/en-us/entra/identity/app-provisioning/use-scim-to-provision-users-and-groups#request-2These queries depend on the mapped attributes on Entra and the SCIM app.
I will recommend you ensure that that the SCIM gateway is correctly configured to include the UID in the URL. You can also view provisioning and audit logs to see where and which data is being sent.
You can also change the base URL to see if it still has that old UID, in that case it is a caching issue you need to fix
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Regards,
Abiola