Mimecast

To register and configure an Application, from Mimecast Administration Console navigate to: Administration | Services | API and Platform Integrations | Available Integrations, locate the Mimecast API 2.0 tile and select Generate Keys. Please see the following KB article for further information on Managing API 2.0 Applications: https://community.mimecast.com/s/article/email-security-cloud-gateway-managing-api-2-0-applications.
To successfully create and manage Mimecast API 2.0 applications, the Security Permissions setting for a logged in administrators' role, must be able to Manage Application Roles. Please see the following KB article for further information on managing roles: https://community.mimecast.com/s/article/Email-Security-Cloud-Gateway-Managing-Administrator-Roles.
The Application configuration process requests a Role (permissions) for access with the specified APIs. This integration requires the following permissions:
- Directories | Internal | Read
- Directories | Groups | Edit
- Services | Directory Sync | Read
After creating this application, you will have Client ID and Client Secret which will be used in a future step.

Visit the Zilla application and login using your admin credentials and then click Add Application in the top right.
A window with a search bar appears, type in Mimecast in the search bar and hit enter. Mimecast app entry will appear at the top of the list, click Add to Applications button to the right.
Fill in the form with appropriate details and then click Add to Applications.
You will have the Mimecast app added into applications tab section, click on it.
A detailed view of Mimecast application appears. Click Sync now in top right corner.
Enable API Integration and fill in the domain, Client ID and Client Secret config details collected from the earlier steps. Click Next.
Click Next and the sync will begin.