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Upgrade ESET Mail Security for Microsoft Exchange Server to the latest version (6.x)


  • Best practices for upgrading ESET Mail Security for Microsoft Exchange (EMSX) to version 6


Existing customers with a valid business license for ESET Mail Security for Microsoft Exchange (EMSX) may upgrade to the latest version of the same product for free.

Before upgrading to version 6.x

  • ESET Mail Security 6 for Microsoft Exchange can only be managed using ESET Remote Administrator 6.2 and laterClick here for information about upgrading to the latest version of ERA.
  • Perform a System State backup on your Microsoft Exchange Server. See the following Microsoft Knowledge Base article for assistance.
  • Make sure that you have your ESET Mail Security for Microsoft Exchange Server (EMSX) License Key available. If you have lost this information or need to request your license information, visit our Lost License page.
  • When migrating EMSX from version 4.3/4.5 to 6, users will need to recreate all rules manually—there is no option to import user-defined rules.
  • Verify all Windows Updates are up-to-date (no pending updates), otherwise this might cause the migration to fail, see this Knowledgebase article for more details.
Do not install over existing EMSX version 4.3/4.5:

We do not recommend that you install over the existing EMSX as it may result in a blue screen error (BSOD).

I. Uninstall previous version of EMSX

  1. Open ESET Mail Security.
  2. Press the F5 key on your keyboard to display the Advanced setup window.
  3. Select Antivirus and antispyware from the Setup tree on the left, deselect Enable Self-defense and then click OK.

Figure 1-1

  1. Restart the server.
  2. Uninstall EMSX version 4.x. 

If you encounter errors when uninstalling EFSW 4.5 using ERA, uninstall ESET manually using the ESET uninstaller tool.

  1. Restart the server after uninstalling EMSX. Continue to part II below to install EMSX version 6. 

II. Install EMSX version 6

  1. Download ESET Mail Security 6
  2. When the download is complete, double-click the installer file to launch the ESET Mail Security for Microsoft Exchange Server installer. A restart will be required during the installation of EMSX 6.
  3. Click Next.

    Figure 1-1

  4. Select I accept the terms in the License Agreement and click Next

    Figure 1-2

  5. Select Complete and click Next.

    Figure 1-3

  6. Click Install.

    Figure 1-4

  7. When prompted to restart your computer, click Yes.

    Figure 1-5

  8. After the computer restarts, the installation will resume. Once the installation is finished, you  will be prompted to activate your product using a License Key. Enter your ESET-issued License Key into the blank field and click Activate (if you do not have your License Key, click here to have your license information sent to you).

    Figure 1-6
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  9. After a successful activation, click Done.

    Figure 1-7
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