Domain name listed incorrectly on client computer

[C Did]

Hi,
On a new workstation, I successfully join a domain "mydomain.com"

Yet after the reboot, I attempt to log in, but the domain "mydomain" is
listed in the login drop-down box, not "mydomain.com"

login fails.

What is wrong?

thanks

 

[Kevin D. Goodknecht Sr. [MVP]]

Hi,
On a new workstation, I successfully join a domain "mydomain.com"

Yet after the reboot, I attempt to log in, but the domain "mydomain"
is listed in the login drop-down box, not "mydomain.com"

login fails.

The drop down has the NetBIOS domain name.
Make sure you have only the internal DNS listed in TCP/IP properties on the
DCs and Member clients. No ISP's DNS allowed in any position on any
interface.

Try dcdiag /fix and netdiag /fix on the DC.
The logs for these are in the directories the command is ran from,
e.g. C:\Documents and Settings\Administrator

 

[Herb Martin]

The drop down has the NetBIOS domain name.
Make sure you have only the internal DNS listed in TCP/IP properties on
the
DCs and Member clients. No ISP's DNS allowed in any position on any
interface.

Try dcdiag /fix and netdiag /fix on the DC.
The logs for these are in the directories the command is ran from,
e.g. C:\Documents and Settings\Administrator

Everything Kevin said!!! Most authentication problems are
DNS based -- either on the DC or DNS server OR by having
the Client NIC->IP Properties pointed to the wrong OR
a mixed set of DNS servers (NO outside servers allowed as
Kevin said.)

Dump the Xdiag command outputs to text files and search
for FAIL, WARN, and ERROR -- fix all problems or report
here with your UNEDITED "ipconfig /all" results.