If you are getting an Error 404 when trying to reach DAT Power, ensure that you are not putting www in front of the address (eg. www.power.dat.com)
Ensure that you are entering the http://power.dat.com instead or click the link provided here.
If the customer is inputting the address correctly:
With a recent update to ATT internet service, they no longer allow their customers to access websites without HTTPS security capabilities. This effects our products:
Customers won't be able to access the landing page of DAT Power, but if they go directly to the login page at: https://power.dat.com/login?ReturnUrl=%2f they can still login and use Power.
TruckersEdge and Express
Customers will not be able to use these products. With TruckersEdge, they can get to the login page, but will be redirected once they log in to: https://myattwg.att.com/UverseAccount.html
If customers are experiencing this, advise them to call their ISP. In the meantime, offer to send them matches via email or voice.