An Outlook signature is made up of three files and an additional folder that holds some other files. The three different files enable Outlook to insert a signature into an email based on the Email message format.
- Rich Text Format (RTF)
Each users signatures are located within their own user profile path. The exact location will depend on the version of windows your are running. For example
Documents and Settings\<user>\Application Data\Microsoft\Signatures
Within the Signatures folder you will find the three files along with an additional folder all named to match the signature name in Outlook. In my example I have a signature call Local-Lab-Signature setup in Outlook.
The additional folder (Local-Lab-Signature_files) is used to store any images that may be required by the HTM version of the Outlook signature.