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Error: Certificate With Identifier Is Not Registered on Application

Symptom​

The following error appears in the Health Log for your Microsoft 365-based monitoring plan:

AADSTS700027: The certificate with identifier used to sign the client assertion is not registered on application. 
Reason - The key was not found. Thumbprint of key used by client: '%thumbprint%'

Cause​

Multiple Microsoft 365-based items use the same Entra ID application instead of dedicated applications causing the certificate thumbprint overwrites.

Resolution​

Set up a separate Entra ID application for every Microsoft 365-based item monitored in your environment. Refer to the related articles for additional information on Microsoft 365-based sources.

  • Microsoft 365 — Permissions for Entra ID Auditing ⸱ v10.6
  • Microsoft 365 — Permissions for Exchange Online Auditing ⸱ v10.6
  • Microsoft 365 — Permissions for SharePoint Online Auditing ⸱ v10.6
  • Microsoft 365 — Permissions for Teams Auditing ⸱ v10.6