Office 365 Provisioning Error "Another object with the same value for property onPremisesImmutableId already exists"
Jan 7, 2026
Okta Integration Network
Overview
Another object with the same value for property onPremisesImmutableId already exists. httpStatusCode=400 errorCode=Request_BadRequest errorMessage="Another object with the same value for property onPremisesImmutableId already exists." client-request-id=11111 request-id=11111 timestamp='Fri, 16 Dec 2022 19:17:10 GMT' method=POST url=https://graph.microsoft.com/v1.0/users
Applies To
- Office 365
- Provisioning
Cause
This error occurs when provisioning a new user in Office 365, and the ImmutableID matches that of an already existing user.
Solution
The ImmutableID must have a unique value for each user. To implement a resolution, follow the guidance in this Microsoft Article.
