Hi @Seth Ward,
To access SharePoint, you should go to "<your tenant name>,microsoft.com" instead of "microsoft.sharepoint.com".
Reference: Sign in to SharePoint.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.