If you want to validate a StepOver signature in Adobe Reader/Acrobat you would normally see that the identity of the signer is unknown. This is because a "self-signed" certificate is used for the signature, which is not trusted by Adobe Reader/ Acrobat by default. To change that, you have to install the appropriate Root-Certificate.
There are 4 certificates:
Installer for the certificates
The setups of SignAPI, SimpleSigner or eSignatureOffice have an option to install all StepOver certificates to the windows cert store and to set an option inside Adobe to trust the windows cert store. We also offer a small setup for this certificates installation only:
https://www.stepoverinfo.net/download.php?key=certinstaller
manual Installation Guidelines for Adobe Reader / Acrobat
Download certificate here: