If your SharePoint site redirects you to CMS365, and you can't access your SharePoint site, and you wish to revert it back to a SharePoint page, please follow these steps:

1. Click on your profile picture in the top-right corner
2. From the dropdown menu, select My Dashboard
    
3. Navigate to Site Settings
    
4. Uncheck the option Block direct Access to SharePoint
   
5. Save settings

More information available in Product Guide | Site Configuration