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Download Mimecast for Outlook

There are two versions of Mimecast for Outlook available to download for Outlook clients. The bit version to use depends on your Outlook install, not your Windows install. If your Outlook install is a 32-bit version you will need the 32-bit version of Mimecast for Outlook.

Download Mimecast for Outlook version 5.4 R1

19th June 2015 - Build 5.4.1263.13520

Mimecast for Outlook version 4.X

Mimecast for Outlook version 4 is no longer in active development. Customers are encouraged to migrate to the latest version of Mimecast for Outlook as soon as possible.


Operating System Prerequisites

Either 32 or 64 bit versions of Outlook is supported, however a different installation package should be run depending on the version. Valid Operating System and Outlook Configurations include:



Operating Systems

  • Windows Server 2008 R2 (SP1)
  • Windows Server 2012
  • Windows 7 (SP1)
  • Windows 8.1

Outlook Versions

  • Outlook 2007 (most recent service pack)
  • Outlook 2010
  • Outlook 2013

NOTE: Click-To-Run installs are not currently supported.

Multi User Environments

  • Terminal Services
  • Citrix XenApp 6.5 to 7.5 (from version 5.3 onwards)

NOTE: AppV streaming of Mimecast for Outlook is not supported.

Multi User Environments - SQL Server Version

  • Microsoft SQL Server 2008 or later
  • MySQL Sommunity Server 5.6.21

.NET Framework

  • .NET Version 4 (minimum supported version)
  • .NET Version 4.5 (from version 5.3 onwards)

Valid OS and Outlook Configurations

  • Windows 32-bit with Outlook 32-bit
  • Windows 64-bit with Outlook 32-bit
  • Windows 64-bit with Outlook 64-bit

For detailed prerequisites, click here.


Viewing 2 of 2 comments: view all
I have MS Outlook 2010. Which files/version do I need to download?
Posted 17:52, 21 Nov 2014
The same file is used regardless of the Outlook version - so you just need to determine if you have the 32-bit or the 64-bit version of Outlook.
Posted 09:35, 24 Nov 2014
Viewing 2 of 2 comments: view all
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Last modified
10:08, 23 Jun 2015



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