SAP Universal ID is a unified account across SAP sites that puts you in control by linking all your existing company associations (S/P-user IDs) and switching between them as needed.
You get easier access to different SAP products, with a single login, eliminating the need to keep track of multiple S/P-user IDs.
SAP Universal ID supports over 500 SAP sites including SAP.com, SAP for Me, SAP Community, ONE Support Launchpad, SAP Support Portal, SAP Learning Hub and SAP Partner Portal.
If you're currently using an S-user ID to access several SAP sites, you can setup your SAP Universal ID here. Note that this is currently optional, but will be required in the future if you use these online services. You'll receive notification from SAP before this becomes mandatory.
For questions about SAP Universal ID, visit the FAQ page.
Note: This doesn't affect your SAP Business One user access/credentials in any manner.