Update: Manually removing IMF v1

Scott Schnoll has an update regarding the recent post Intelligent Message Filter (IMF) v1 download removed from microsoft.com, and the issue of not being able to remove IMF v1 from Add/Remove Programs (if one doesn’t remember which account was used to install it or the account is no longer available) without reinstalling it. Here’s the process to manually remove IMF v1 as documented in Microsoft Exchange Server Intelligent Message Filter v2 Operations Guide [available here].

To manually remove Intelligent Message Filter v1:
1. Stop all Exchange services (Information Store, System Attendant, SMTP, and Exchange-aware antivirus services).
2. Rename the MSCFV1 folder in X:\Program Files\Exchsrvr\bin, where X is the drive letter where Exchange Server is installed.
3. Rename the ContentFilter.dll file in \Exchsrvr\bin\
4. Open Regedit and export the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange
5. Delete the ControlFilterVersion subkey from the registry.
6. Restart the server. You should now be able to install Exchange Server 2003 SP2 without errors.

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