Hi dorseydentallab,
Based on your description, I would like to confirm the following information:
1. When you mentioned that “www.dorseydentallab.sharepoint.com”, I would like to confirm what the address is.
2. Which Office 365 plan are you using, Office 365 Enterprise plan (E Plan) or Small Business plan (P Plan)?
To troubleshoot the issue, please refer to the following suggestion:
1. For E Plan, follow the website address information:
The default website address: http://yourdomain-web.sharepoint.com.
The website address with custom domain: http://www.yourcustomdomain.com.
2. For P plan, follow the website address information:
The default website address: http://yourdomain.sharepoint.com.
The website address with custom domain: http://www.yourcustomdomain.com.
In addition, if you changed the public website address, it may take up to 24 hours for the settings that you changed to propagate through all the system.
Thanks,
Anna Shi