If you have tried Crossware Mail Signature on your server, there is no need to un-install the software. Upon purchasing a full licence, Crossware will send you a full licence key to convert your trial version to a non-expiring version.
However if you do want to go ahead with un-installing Crossware Mail Signature, follow these steps:
1. Un-install the Transport Agent from your Exchange Server. (The Transport agent is un-installed from the Add/Remove Programs control panel applet).
2. Un-install the IIS Configuration Site. (The IIS Site is un-installed from the Add/Remove Programs control panel applet).
3. Delete the SQL Database. (Un-installation of the IIS Site will not delete the SQL database. You must manually delete the database).