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Use Okta Email Attribute as Login Name in Mimecast Portal
Single Sign-On
Okta Classic Engine
Okta Identity Engine
Overview
Some users with Okta login names that differ from their Mimecast login names may receive an error when attempting to log in to the Mimecast portal. The error message suggests a SAML issue. This article provides a solution/workaround for this issue by using the Okta email attribute as the login name in Mimecast.
Applies To
  • Okta and Mimecast integration users
  • Security Assertion Markup Language (SAML)
  • Single Sign-On (SSO)
Solution
  1. Login to the Okta Admin Console and click on Applications > Applications. Find the SAML app that should be configured to use the Okta Email attribute.

  2. Click on the Sign On tab and then click on Edit. Locate the Application username setting.

  3. Change the Application username format setting to Email.

Credentials details

  1. Save the changes.

  2. Navigate to the Assignments tab and select the user/group assignment that needs to use the Okta email attribute as the login name in Mimecast.

  3. Click on the Update Now button under the Sign On tab for existing user/group assignments. This ensures that the changes made in Step 3 will apply to the existing user/group assignment.

Credentials Details

  1. Users can now log in to the Mimecast portal using their Okta email attribute as the login name.

 

NOTE: After Step 6, set the Application username setting back to its original value (the value it had before changing it to Email in Step 3).


 

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Use Okta Email Attribute as Login Name in Mimecast Portal