SSO Login Fails with HTTP ERROR 500
Error:
During SSO login using Azure AD (Microsoft ADFS OpenID), the following error appears:
“This page is not working at the moment – identity.document360.io can’t currently handle this request (HTTP ERROR 500)”
Error page displayed during SSO authentication showing an HTTP ERROR 500 message.
Cause
This issue occurs when the client secret configured for the Azure AD (Microsoft ADFS) SSO application has expired. As a result, the token endpoint returns a 401 Unauthorized response during the authentication process.
Steps to resolve
Sign in to the Azure portal.
Navigate to Microsoft Entra ID > App registrations.
Open the SSO application using the configured Client ID.
Go to Certificates & secrets.
Under Client secrets, click New client secret.
Enter a description and select the required expiry duration.
Click Add.
Copy the Secret Value immediately.
Do not copy the Secret ID, as the secret value is displayed only once.
In Document360, navigate to the SSO / IdP configuration.
Replace the existing client secret with the newly generated secret value.
Save the changes.
Test the SSO login again to confirm the issue is resolved.