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Can't authenticate local admin using RDP

Posted on 2014-09-08
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Last Modified: 2014-09-26
Trying to login to a Windows server remotely using RDP local Administrator username and password as credentials, but I get a failure to authenticate. Syntax I'm using is <servername>\Administrator and then the password. I can logon remotely using my Domain admin account, however. So I know RDP is working fine.

User Rights Assignments have the Administrator group as member of Allow Log on Locally and Allow Log on through Remote Desktop Services and Administrator local user is a member of the local Administrator group. Any ideas appreciated.
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Question by:nurturer69
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Expert Comment

by:becraig
ID: 40310809
This sounds like built-in Administrator account is disabled or blocked from local logon.

This would not be surprising as it is an industry best practice not to allow remote access for built-in accounts.
They should generally be disabled the first chance you get.
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Author Comment

by:nurturer69
ID: 40310858
So, as it is a built-in account and presumed 'local', no RDP access is possible?
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Expert Comment

by:becraig
ID: 40310860
It depends on the state of the account.

It is however not recommended to leave built-in accounts functional.
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Author Comment

by:nurturer69
ID: 40312156
Well, I've been charged with making them functional. May not agree with it, but that's the deal. So, I need to figure out can the local administrator account be accessed thru RDP? And what might be preventing that from happening.
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Accepted Solution

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becraig earned 500 total points
ID: 40312539
Here is a link from MS on enabling the built-in Administrator account:

http://technet.microsoft.com/en-us/library/hh825104.aspx

You can then check to see if you have any defined group policy blocking local logon for the administrator account, or better yet just add it to one of the groups already granted local logon, since it is not really an RDP connection as the local user is logging onto the local computer.
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