Automatic Signature with Exclaimer 4.20 in Exchange 2003 Server are not shown in email messages.

To resolve it try the following:

1. Go to command prompt.
2. In the command prompt, please type IISReset. Wait for the process to stop and restart.
3. Once it has re-started, close the command prompt window and navigate to Program files/Exclaimer folder.
4. In this folder is a file called QAHelper. Run the QAHelper file.
5. Click on uninstall.
6. Once that is done click on install.

Note: IISReset usually do the trick, no need to run the QAHelper.