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Connecting Two Servers From Different Domains

Posted on 2016-07-21
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Last Modified: 2016-08-06
We acquired another business about 6 months ago and are migrating the data off of an old server onto a new one. The old server is 2003 R2 and is still on the old domain. The new server is 2012 R2 and is on our domain. I can connect via Windows Explorer from the old to the new to copy some of the data. I don't know what the local admin password is on the old server so I was wondering if there was another way I could browse to it without resetting the Admin password. I can login to the old server under the old domain account.
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Question by:itgolfer
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Expert Comment

by:Lee W, MVP
ID: 41723067
The "old domain account" - you mean the old server's domain admin account?  You know that one?  Then connect to it from the new server - on the new server, access an admin share (like \\oldserver\c$ - this should prompt you for credentials - enter the olddomain\olddomainadmin account and associated password.  You should now be connected.

You can also map a drive to a share on the old server from the new server using the command line
net use x: \\oldserver\share * /user:olddomain\olddomainadmin

Or just use explorer and provide alternate credentials.

If this is NOT what you mean, please be more explicit.
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Author Comment

by:itgolfer
ID: 41723073
Yes, I know the old domain admin account and can log in to the server with that. However, when I try to connect from the new server to a share on the old server using \\xxx.xxx.xxx.xxx, it just says it can't access it and doesn't prompt me for credentials.

I may just join it to our domain but I didn't know if there was another option before I did that.
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by:Lee W, MVP
ID: 41723143
Did you try the net use command?

NET USE \\xxx.xxx.xxx.xxx\share * /user:olddomain\olddomainadmin
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by:XcelogiX
ID: 41723176
Do you have a trust setup between the two domains? if so, you could add a user from the "new" domain to the Administrators group on the old server.
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Author Comment

by:itgolfer
ID: 41723182
I do not have a trust setup. The domain controller for the old domain has been shutdown for a while since it wasn't needed and I didn't want to have to manage it. This is the only device from the old domain that is still powered on.
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Expert Comment

by:XcelogiX
ID: 41723193
You could add a new local user and make it an Administrator, so you will have continued access to the box (Cached Credentials will expire over time, and you won't be able to log in with that old username)

Once you have done that, you might want to check the permissions on the file share to make sure Administrators does indeed have access, sometimes admins remove that which can be confusing. If there were any folders in the share where users had the ability to change permissions, you might have to take ownership of the folder and reapply permissions down to get everything to copy correctly.
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Accepted Solution

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itgolfer earned 0 total points
ID: 41737341
I ended up joining it to our domain and it didn't break anything.
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Author Closing Comment

by:itgolfer
ID: 41745351
Went a different route.
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