Outlook Add-in Deployment
In an Active Directory domain environment, the E-Mail Archive Outlook Add-in can be deployed using group policies (GPOs). The setup file for the E-Mail Archive Outlook Add-in is stored in the installation directory of MailStore SPE in a Setup-<version> subfolder. Alternatively, the setup file can be located on the start page of the Client Access Server when accessed without an instance id, e.g. https://cas.example.com.
The ADMX files to configure the Add-in can be found here.
With setup and template file the deployment can be done by following this article.