
Make sure you have downloaded and installed the signature area definition plugin for Outlook, available here: https://www.secure-exchanges.com/technologie-cybersecurite.aspx
If the plugin is installed but the option still does not appear:
Press Windows + R
Copy and paste the following path, then click OK :
% userprofile%\AppData\Roaming\SecureExchanges
You will be directed to the Secure Exchanges installation folder.
In this folder, check if a folder named PDFSignForm is present.
If it is present: restart Outlook and check again.
If it is absent: this means that the plug-in has been installed in another directory
In this case, you must:
Locate the PDFSignForm folder in the location where it was installed.
Copy it to the SecureExchanges folder mentioned above.
Once the folder is copied, restart Outlook. The " Set signature areas" section should now be available.