Hi All, We are running two DC's on 4.11.x and I noticed that our clients strongly prefer the original DC. If I search my logs for "Authentication" with the second DC2's name, I get less than 5 authentications a day. If I search for "authentication' and the first DC1's name, I get thousands of results per day. If I turn off DC1, DC2 seems to work properly and handle requests. All of the FSMO roles are currently on DC2. Any ideas of what to check first? In looking at my configurations and logs and I'm not seeing anything obvious (well...to me) that would cause this. Any help would be greatly appreciated! Thanks! Bill -- -- This electronic message, including its attachments (if any), is CONFIDENTIAL and may contain PROPRIETARY or LEGALLY PRIVILEGED information. If you are not the intended recipient, you are hereby notified that any use, disclosure, copying, or distribution of this message, its attachments, or any of the information included therein, is unauthorized and strictly prohibited. If you have received this message in error, please immediately notify the sender by reply e-mail and permanently delete this message and its attachments, along with any copies thereof.