Intelligent Message Filtering

From Mike's Wiki

Configure IMF to Update

Like antivirus applications, a spam detection application needs to be regularly updated. IMF is not enabled by default to update automatically, but can be quickly and easily via a registry change.

Open the registry editor and move down to the following location:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange

Create a new DWORD in the root of that location (usually by right clicking on Exchange) called ContentFilterState Give the new DWORD key a vale of 1 and close the registry editor.

The update comes down with automatic updates. If you are using Windows Server Update Services, then it comes down with that. Make sure that you have enabled Exchange server as a product for to download updates for.