Rename surname and givenName of contact object - powershell

Question

Can someone please tell me how I can rename sn and givenName of a contact object in active directory?
This is how I query the data in my contacts OU:
Get-ADObject -Filter {(ObjectClass -eq "contact") -and (givenName -like "*myName*") } -Properties sn, givenName -SearchBase "OU=contacts,DC=domain,DC=name"
From Microsoft:
To modify the given name, surname and other name of a user, use the
Set-ADUser cmdlet
My goal is to modify the values of both properties because I have text that is all in lowercase and I was hoping to use something like:
$TextInfo = (Get-Culture).TextInfo
$TextInfo.ToTitleCase("one-two three")
Desired Output: One-Two Three
to get a capital letter for each word.
Some examples would be great.
If you know of a GUI-Tool that does what I need then please share as well.

Answer 1

To change the attributes on a contact AD object you will need to use the Set-ADOject Cmdlet, with the -Replace parameter. Set-ADUser will only set attributes of an AD object of type user.
The following code will take the full name of the contact object, search for it in AD and then change the GivenName, SN and DisplayName to title case.
I have added the DisplayName as this field is not automatically update when you change the first and last name, but you can delete this part if it's not needed.
$fullname = "My Name"
$contact = Get-ADObject -Filter {(ObjectClass -eq "contact") -and (Name -like $fullname)} -Properties * -SearchBase "OU=contacts,DC=domain,DC=name"
$TextInfo = (Get-Culture).TextInfo
$GivenNametoTitleCase = $TextInfo.ToTitleCase(($contact.givenName).ToLower())
$SNtoTitleCase = $TextInfo.ToTitleCase(($contact.sn).ToLower())
$DisplayNametoTitleCase = $TextInfo.ToTitleCase(($contact.DisplayName).ToLower())
$contact | Set-ADObject -Replace #{GivenName=$GivenNametoTitleCase;`
sn=$SNtoTitleCase;`
DisplayName=$DisplayNametoTitleCase;}