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"Internal Error 2753" appears when installing the Messaging Security Agent (MSA) of Worry-Free Business Security (WFBS)

    • Updated:
    • 5 Sep 2017
    • Product/Version:
    • Worry-Free Business Security Standard/Advanced 7.0
    • Worry-Free Business Security Standard/Advanced 8.0
    • Worry-Free Business Security Standard/Advanced 9.0
    • Worry-Free Business Security Standard/Advanced 9.5
    • Platform:
    • Windows 2003 Home Server
    • Windows 2003 Small Business Server
    • Windows 2003 Standard Server Edition
    • Windows 2008 Essential Business Server
    • Windows 2008 Small Business Server
    • Windows 7 32-bit
    • Windows Vista 32-bit
    • Windows XP Professional
Summary

When installing or reinstalling the MSA, you get the following error:

Messaging Security Agent failed to be installed on the Exchange server: sunmail
The operation will continue until it is completed even if the window is closed.
Internal Error 2753: instISDeferredCustomActionSt

Internal Error 2753

Details
Public

To resolve the issue:

  1. Open the Registry Editor (regedit.exe).
     
    Always back up the whole registry before making any modifications. Incorrect changes to the registry can cause serious system problems.
  2. Delete the following registry key:

    [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\UpgradeCodes
    \F79BAC82EE02C8A4CB43EE3AB234B806]

  3. Reinstall the MSA.
Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1054861
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