When you encounter a web address like o3654uww-my.sharepoint.com, you are looking at a specific document portal hosted within Microsoft's cloud infrastructure. You should not expect to find a standard business landing page here, as this domain is designed for user authentication rather than public marketing. The redirect to the Microsoft login page is a standard security practice that ensures your credentials are confirmed by the official identity provider.
Most legitimate file storage sites operate exactly like this, separating private workspaces from public web traffic. Because this is a subdomain of SharePoint, it does not handle public consumer sales or maintain a history of web presence in the same way an e-commerce store would. If you were invited to log in here by a colleague or an organization, you are likely accessing a shared workplace folder. The primary question of is o3654uww-my.sharepoint.com a scam can be answered with a firm no, as the backend traffic is managed entirely through established Microsoft protocols. Only use this portal if you are expecting a document or file shared by someone you already know.