First extract the addon .zip archive you downloaded to a directory on your machine. The file contains two files:
- An executable installation file.
- A file containing information about the addon (surname .ard).
Installation or upgrade of the OnePay addon in SAP is performed by going to [Administration -> Add-Ons -> Add-On Administration]. Press the "Register add-on" and select "Registration file". Locate the site or directory you extracted the zip file and select data file with surname .ard.
Approve and press "OK" to initiate the installation or upgrade of the addon.
Restart SAP Business One on all workstations to trigger automatic installation or upgrade of the addon.
Note: On terminal servers, all users must be logged off SAP Business One for the installation to take place without any problems.