If you encounter this error when trying to configure SSO, it is typically caused by incorrect SSO parameters and/or cookie cache problems.
To resolve this issue, we suggest checking the following:
-
Grammarly SAML application has been configured correctly in your identity provider. It’s essential to validate that the following parameters have been set correctly:
- Single sign-on URL: https://sso.grammarly.com/saml/assertion
- Audience URI/SP Entity ID/Issuer: https://sso.grammarly.com/saml/metadata
- Name ID format: EmailAddress
- Name ID / Application Username / Unique Identifier: Email
- Required Attributes/Claims:
- EmailAddress
- FirstName
- LastName
Note: The names of attributes/claims must follow the specified format. Alternative name spellings or FriendlyNames are not supported.
- If the Grammarly SAML application is configured correctly, make sure that the IdP EntityID, SAML 2.0. Endpoint URLs, and the x.509 certificate used for SSO configuration are valid and copied correctly.
- Clear your browser’s cookies and cache, log in to your Grammarly Business account, and try configuring SSO again. You can also try using incognito or private mode in your browser.