Dungeons And Dragons Online: Billing and Authentication Servers will be offline November 30th

This is from the official forums and the game client:

The Billing System and Authentication Server will be down for maintenance tomorrow, November 30th,from 10:30-11:30 am EST. During this time you will not be able to log in to the game, create a new account, or edit your account data. Please note: the game servers will still be online so if you'd like to play DDO during the maintenance window be sure to login to the game before 10:30 am EST.