Trying to wrap powershell around DCPROMO for remote WS2k8R2 promotion

PowerShell Help
1

Hi,
I am trying the code fragment below to try to wrap Powershell around DCPRomo to promote a new domain controller in an existing domain, I am able to build the unattend file, pass it to the remote server, then use the invoke-command to start DCPromo succesfully.
But DCPromo itself is failing with the error (second quote below)

$AdminCred=Get-Credential -Message ‘Please provide user credentials with privileges for AD Promotion’
$AdminUsername = $admincred.username
$AdminPassword = $AdminCred.GetNetworkCredential().password
Invoke-Command -Session $s -ScriptBlock {param($AdminUsername,$AdminPassword) dcpromo.exe /unattend:$MyUnattend /UserName:“$AdminUsername” /Password:“$AdminPassword”}

Below the specific error:

dcpromoui 974.314 020C 09:50:42.692 Enter CLdapOperationConnect::Execute target=$(domainDnsName), options=0x10
dcpromoui 974.314 020D 09:50:42.708 DsGetDcNameW() returned TESTAD2K8.contoso.com
dcpromoui 974.314 020E 09:50:42.723 Calling ldap_bind_sW(ld, NULL, pCreds, 1158)
dcpromoui 974.314 020F 09:50:42.739 LDAP connect(TESTAD2K8.contoso.com) succeeded
dcpromoui 974.314 0210 09:50:42.739 lastLdapError <- "0"
dcpromoui 974.314 0211 09:50:42.739 Enter CLdapOperationRead::Execute
dcpromoui 974.314 0212 09:50:42.739 ldap_search("", 0, "objectClass=*", "defaultNamingContext;configurationNamingContext;schemaNamingContext;rootDomainNamingContext;dsServiceName;domainControllerFunctionality;domainFunctionality;forestFunctionality;tokenGroups;dnsHostName")
dcpromoui 974.314 0213 09:50:42.755 lastLdapError <- "1"
dcpromoui 974.314 0214 09:50:42.770 ldap_search() failed, err=1
000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1
dcpromoui 974.314 0215 09:50:42.770 ***** EXCEPTION: 8007006e ldap_search() failed, err=1
000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1
dcpromoui 974.314 0216 09:50:42.770 Enter CLdapOperationDisconnect::Execute
dcpromoui 974.314 0217 09:50:42.770 ExecuteScript() failed:
ldap_search() failed, err=1
000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1

dcpromoui 974.314 0218 09:50:42.770 ExamineForest failed. The error is ldap_search() failed, err=1
000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1
dcpromoui 974.314 0219 09:50:42.770 performed state 11, next state 37
dcpromoui 974.314 021A 09:50:42.770 Enter State::GetHadNonCriticalFailures
dcpromoui 974.314 021B 09:50:42.770 bHadNonCriticalFailures = false
dcpromoui 974.314 021C 09:50:42.770 Enter State::UnbindFromReplicationPartnetDC
dcpromoui 974.314 021D 09:50:42.770 Exit code is 78
dcpromoui 974.314 021E 09:50:42.770 Failed to examine the Active Directory forest.
dcpromoui 974.314 021F 09:50:42.770 closing log
dcpromoui 974.314 0031 09:50:42.786 Exit code is 78
dcpromoui 974.314 0032 09:50:42.786 closing log
2

I forgot to mention, the exact command when executed locally works just fine.

3

Nevermind, figured what the error was and it is the damned parameter variable passing of the Invoke-Command. It now looks like:

Invoke-Command -Session $s -ScriptBlock {param($AdminUsername,$AdminPassword) dcpromo.exe /unattend:$MyUnattend /UserName:“$AdminUsername” /Password:“$AdminPassword”} -ArgumentList $AdminUsername, $AdminPassword