Mimecast Personal Portal - Outlook Add-in - Installation

This article contains information on deploying the Mimecast Personal Portal Add-in for Microsoft Outlook, including prerequisites, supported environments, download instructions, and deployment steps for Microsoft 365 and Exchange Server.

Prerequisites

  • You have Exchange Administrator, Application Administrator, and Privileged Role administrator roles.
  • You have Global Administrator access in Microsoft 365.

Supported Environments

Currently, the Mimecast Personal Portal Add-in is supported in the following environments:

Exchange Server
  • Microsoft 365 (Exchange Online)
  • Exchange Server Subscription Edition (SE) (On-Premise)
Outlook Desktop Client

Windows

  • Microsoft 365 Outlook Classic Windows
  • Microsoft 365 New Outlook Windows
  • Outlook (2021 and 2024)

macOS

  • Microsoft 365 Outlook for Mac
  • Outlook (2021 or 2024 for Mac)

The Mimecast Personal Portal Add-in follows the Microsoft Office Lifecycle for supported clients. Please ensure you are using the latest version of Outlook.

Windows

macOS

Web Browser

Windows

  • Chrome
  • Edge
  • Firefox

macOS

  • Chrome
  • Edge
  • Firefox
  • Safari*
  • Use the most recent version of any browser listed.
  • Ensure the browser is set to allow cookies from Mimecast.
  • *Prevent Cross-site tracking must be disabled in Safari.
  • The Mimecast Personal Portal Add-in is not supported on mobile browsers.
Mobile

Outlook Mobile iOS*

Outlook Mobile for Android*

  • *Supported if the mailbox is hosted in Microsoft 365 / Exchange Online.
  • The latest version of Outlook Mobile is supported.

Downloading the Add-in

The Mimecast Personal Portal Add-in is available for download from Mimecast Application Downloads.

Deploying the Application

Microsoft 365 Admin Center

The Mimecast Personal Portal Add-in can be deployed to mailboxes hosted in Microsoft Exchange Online through Integrated Applications in the Microsoft 365 Admin Center. See Deploy add-ins in the admin center - Microsoft 365 admin center.

Integrated Applications

You can deploy the Mimecast Personal Portal Add-in, by using the following steps:

  1. In the Microsoft 365 Admin Center, click Settings (click Show All to expand the menu).
  2. In the Settings menu, select Integrated Apps.
  3. Click Upload custom apps.
      Integrated Applications - Upload Custom Apps
  4. Select Office Add-in from the App Type dropdown.
  5. Select Upload manifest file (.xml) from device and click on Choose File.
  6. From the file browser, navigate to when the add-in was downloaded to and select the manifest (.xml) file.
  7. Once uploaded, click on next.
  8. Select the users you wish to assign the add-in to, and click on next.
  9. Review the permissions required, and click on next.
  10. You can now review the deployment and click Finish Deployment to start it.

The add-in will take up to 12 hours to be displayed on End Users' ribbons. End Users might need to relaunch Microsoft Outlook.

Exchange Subscription Edition (SE) Deployment

For more information, visit the Exchange Admin Center to deploy add-ins.

You can configure Microsoft Outlook Add-ins in the Exchange Admin Center, by using the following steps:

  1. Log in to the Exchange Admin Center (EAC) for your organization.
  2. Navigate to Organization | Add-ins.
  3. Click on New.
  4. Select Add from file.
  5. From the file browser, navigate to when the add-in was downloaded to and select the manifest (.xml) file.
  6. Click on Save.

See Also:

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Comments

3 comments
Date Votes
  • If your Microsoft Tenant uses Intune, like my tenant does, you will not see the option for Microsoft 365 installation options under Settings > Org settings > Services >. You obviously need to deploy this app via Intune to your client computers. I have also just discovered that .XML manifests cannot be natively distributed via Intune. Therefore, Mimecast can we please have an MSI to distribute via Intune?

    0
  • Hi Chris, 

    Thank you for your feedback. Here is some information that may explain the issue you are experiencing and how to resolve it:

    Outlook add-ins aren't deployed to computers through Intune; they are deployed through Exchange. If you don't see the option for Integrated Applications in the M365 Admin Center,  you may not have the correct administrator role to complete the install. A Global Administrator, or one of the roles described in this Microsoft KB Article can access the Integrated Apps Portal to deploy the MPP app.

    Outlook add-ins are required to be in XML format to deploy through Exchange. You cannot deploy an Outlook add-in through Intune.
     

    I hope this helps. If not, please take a look at the following article on raising a Support Case to get further assistance: https://mimecastsupport.zendesk.com/hc/en-us/articles/34000342907923-Mimecast-Customer-Care-Raising-a-Case 

    1
  • Hi KP Admin

    I have now managed to deploy this Add in 

    0

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