Mimecast redirects back to the login page after entering Okta credentials during the login process.
 

• Mimecast
• Secure Assertion Markup Language (SAML)
• Okta Classic Engine

The Mimecast SAML endpoint has changed in Mimecast V3.

Replace the existing Mimecast application with the Mimecast v3 application:

1. In Okta Admin Console, navigate to Applications > Applications and click Add Application.
2. Enter Mimecast in the search field. Find the result entitled "Mimecast Personal Portal v3" and click Add.
3. During the application configuration, click View Setup Instructions.
4. Copy the Metadata URL provided in the setup instructions.
5. In the Mimecast portal, update the Okta Metadata URL with the URL copied in the above step.