Error AADSTS50003 – No signing key configured
This article addresses a situation in which you attempt to sign into a SAML-based single sign-on (SSO) configured app that has been linked with Azure Active Directory (Azure AD) and obtain the error message “Error AADSTS50003 – No signing key configured.”
Symptoms
You receive error AADSTS50003 when trying to sign into an application that has been setup to use Azure AD for identity management using SAML-based SSO.
Cause
The application object is corrupted and Azure AD doesn’t recognize the certificate configured for the application.
Resolution
To delete and create a new certificate, follow the steps below:
- On the SAML-based SSO configuration screen, select Create new certificate under the SAML signing Certificate section.
- Select Expiration date and then click Save.
- Check Make new certificate active to override the active certificate. Then, click Save at the top of the pane and accept to activate the rollover certificate.
- Under the SAML Signing Certificate section, click remove to remove the Unused certificate.
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