Create AD user in a different domain - powershell

Question

I created a series of scripts for creating domain users. Since every domain where we create users requires different parameters and conditions, I have one script for each domain. But in case of one domain I have a problem. For this domain the manual procedure is like this:
1) open dsa.msc
2) connect to the "xyz" domain (the user is being created from a server in "abc" domain)
3) Create the user (operation for 10 to 15 minutes, that's why I created the scripts)
Unfortunately, when I run my script, I get the error message, that "The server is unwilling to process the request" (That's the precise complete error message) during execution of New-ADUser cmdlet. I suppose the reason is the need to perform the step 2 in the procedure I described above. So I somehow need to simulate it in the script, but I have no idea how to do that.
This is how the command is defined:
$params = #{
'GivenName' = $First_name_val.Text
'Surname' = $Second_name_val.Text
'DisplayName' = $Display_name
'AccountPassword' = $password
'Path' = $Location_val.Text
'Name' = $User_name_val.Text
'CannotChangePassword' = $Cannot_chg_pass.Checked
'PasswordNeverExpires' = $Pass_not_expires.Checked
'ChangePasswordAtLogon' = $Must_chg_pass.Checked
'Enabled' = !($Account_disabled_val.Checked)
'Description' = $GECOS_val.Text
'Office' = "NA"
'OfficePhone' = "NA"
'Title' = $Job_Title_val.Text
'Department' = $Department_val.Text
'Company' = $Company_val.Text
'SamAccountName' = $User_name_val.Text
'UserPrincipalName' = $User_name_val.Text + "#woodplc.com"
'EmailAddress' = $Email_Address_val.Text
'PassThru' = $true
}
$New_user = New-ADUser #params
Definition of $User_name_val.Text is here:
#region Real name of the user
[void]$AD_user_creation.SuspendLayout()
$Display_name_lbl = New-Object system.Windows.Forms.Label
$Display_name_lbl.text = "User`'s real name"
$Display_name_lbl.AutoSize = $true
$Display_name_lbl.width = 25
$Display_name_lbl.height = 10
$Display_name_lbl.location = New-Object System.Drawing.Point(10,10)
$First_name_val = New-Object system.Windows.Forms.TextBox
$First_name_val.Text = "a."
$First_name_val.multiline = $false
$First_name_val.width = 120
$First_name_val.height = 20
$First_name_val.location = New-Object System.Drawing.Point(200,10)
$Second_name_val = New-Object system.Windows.Forms.TextBox
$Second_name_val.multiline = $false
$Second_name_val.width = 120
$Second_name_val.height = 20
$Second_name_val.location = New-Object System.Drawing.Point(330,10)
$Display_name_val = New-Object system.Windows.Forms.Label
$Display_name_val.Text = ""
$Display_name_val.width = 250
$Display_name_val.height = 20
$Display_name_val.location = New-Object System.Drawing.Point(200,40)
$showFullName = { $Display_name_val.Text = ($First_name_val.Text + "." + $Second_name_val.Text) }
[void]$Second_name_val.Add_Leave( { & $showFullName } )
[void]$First_name_val.Add_Leave( { & $showFullName } )
#endregion
#region User name of the user
$User_name_lbl = New-Object system.Windows.Forms.Label
$User_name_lbl.text = "User logon name"
$User_name_lbl.AutoSize = $true
$User_name_lbl.width = 25
$User_name_lbl.height = 10
$User_name_lbl.location = New-Object System.Drawing.Point(10,70)
$User_name_val = New-Object system.Windows.Forms.TextBox
$User_name_val.multiline = $false
$User_name_val.width = 250
$User_name_val.height = 20
$User_name_val.location = New-Object System.Drawing.Point(200,70)
$LogonName = {$User_name_val.Text = ($First_name_val.Text + "." + $Second_name_val.Text)}
[void]$Second_name_val.Add_Leave({& $LogonName})
[void]$First_name_val.Add_Leave({& $LogonName})
[void]$AD_user_creation.ResumeLayout()
#endregion

Answer 1

The error "The server is unwilling to process the request" means that some of your input values are invalid. For example, the OU you are providing could be invalid (maybe a space that shouldn't be there), or the SamAccountName might be too long or contain an invalid character, etc.
If you show the full command you are using I might be able to spot something.
If there was an issue connecting to the server or authenticating, then the error message would be different.