This article goes over how to access Unite Manager.
INSTRUCTIONS & INFO
To open the Unite Manager, first connect a computer to your hotspot's Wi-Fi network.
From the connected device, open the web browser.
Enter 'http://attunite' in the Web address bar, then press Enter.
Enter the required password as displayed on the Change Password section of your AT&T Unite, then click Sign In. Note: The default password for the AT&T Unite is 'attadmin'.