Hello there! Can someone guide/tell me if NetSuite and One Drive integration is possible? The idea is to transfer the file pdf printout of transaction in NetSuite to OneDrive.

As long as any system provides REST APIs you can integrate that system with netsuite. A quick google search tells me there are APIs available, so there shouldn't be any concern. You need to read the docs though.

AFAIK, this is not possible with NetSuite alone. You'd need to add an external service to the mix because SuiteScript is not able to send a raw octet stream.

There certainly is a way. If you're interested, we have a built-for-NetSuite SuiteApp available called eXtendFiles that can support your OneDrive integration. We've built some custom routines for clients who want to migrate those PDFs being created & sent from NetSuite over to OneDrive on a scheduled basis. With our solution, every file that you upload to your cloud storage is then represented by an unlocked, NetSuite custom record so you can add your own metadata, run searches, build workflows, etc. Just look us up: eXtendFiles.

eXtendFiles has no external dependencies?

eXtendFiles uses a token-based auth and webhooks to integrate with OneDrive.