“The RPC server is unavailable” while trying to take Remote Desktop of 2003 Server

When trying to logon to Windows server 2003 via remote desktop you receive the following message:

The system cannot log you on due to the following error:
The RPC server is unavailable.
Please try again or consult your system administrator.

You will also receive the following event in the target server’s application event log:

Event ID: 1219
Logon rejected for Domain\User. Unable to obtain Terminal Server User Configuration. Error: The RPC server is unavailable.

To resolve this :

1. Locate the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server
2. Create a new DWORD called IgnoreRegUserConfigErrors
3. Give it a value of 1

Source

ADD extensionAttribute

If you have different upn names , than your domain server name and you need to use different upn-s for ldap queris you can add sammaacountname + server domain name to custem attributes.

In file atribute.txt write users sammaccountnames.

Import-Module ActiveDirectory
$Users = Get-Content c:\tmp\atribute.txt
ForEach ($User in $Users) {
$username = Get-ADUser -Server test.local -Identity "$user" -Properties  samaccountname |select -ExpandProperty samaccountname
Set-ADUser -Server test.local -Identity "$user" -Add @{extensionAttribute13="$Username@test.local"}
}