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Unable to log on NT Domain.

My workstation is win2000 pro, and the server is winNT 4.  When I tried to click on My Computer, properties, Network ID tab, Network ID button, then follow the wizard to add this workstation to the network, it says cant find the computer on the domain, then as to input computer name and domain.  Once  entered, it then ask for an acct name and pwd that have permission to join the domain.  I enter the admin acct. It returns w/ the following msg
"Your computer could not join the domain because of the following error has occured.  The credential supplied conflicts with an existing set of credentials."  Then repop the account w/ permission dialogue box.

I tried to search for the solution on Microsoft website, but they basically said the account was already logged on, either by user or application...  One more thing, currently, the default Domain is the Computer name for this workstation and I could check email on the NT server domain using MS outlooks just fine.

Have anyone has this problem before?  How do we fix this?
1 Solution
If you have any existing network connections to the server, you need to disconnect them (mapped network drives, etc) Check by right clicking My Network Spaces and choose disconnect.

Those connections have a username associated with them. When you try to join the domain and need to put in a different name name password, it barfs because only one username can be used at a time to talk to the server.
Join the computer to a generic workgroup first using the Properties button (not network ID).  You don't have to bother rebooting.  In Server Manager, remove your computer from the domain.  Then add the client to the domain by using the Properties button instead of the Network ID button.
cdlovesAuthor Commented:
That solves the problem nicely.  Thank you.
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