If you have Scrive New activated, offboarding is easily setup via logging into the service after selecting the preferred offboarding method.
Navigate to the Offboarding page via logging into scrive.com -> Account -> Integration Settings -> Offboarding. Click connect and login with the user credentials you want to connect with.
If you're not already logged in you will be asked to login with your credentials, however after that is done, you will be redirected to the same page again where the status now has changed to:
"Status : OK"
When you have the connection done, it can take up to 24 hours before the connection between Scrive and Onedrive is finalized. However when it's done, it only takes a couple of minutes before the documents get offboarded.
The documents will be offboarded to a folder called "Scrived Documents" located in the root of the Onedrive environment.