Write and Get User Profile Properties in SharePoint Online with CSOM in PowerShell

A couple of weeks ago Vesa Juvonen wrote a post about the new capability in CSOM that is letting us to write user profile properties. This feature is already enabled in all Office 365 tenants.
The features are available in Microsoft.SharePoint.Client.UserProfiles.dll assembly version 16. Here is the moment to mention that if you download the latest CSOM package you will receive client dlls version 15 and version 16. In my earlier post I wrote about using CSOM in powershell I mentioned that the client dlls are located in "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI", well there are version 15 dlls that can be used against SharePoint 2013 on-premise. But if you want to use the latest and greatest features against SharePoint Online you should load the version 16 dlls located in "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI".
The new features are coming  from two new methods in PeopleManager class, SetSingleValueProfileProperty() and SetMultiValuedProfileProperty().
In his post Vesa gives example code that demonstrates the capability in SharePoint app. I found this interesting and since I am not a developer I will show you how this works in PowerShell. Unfortunately, I was unable to get SetMultiValuedProfileProperty() working from powershell, I think that this is because of the issue with the generic lists in powershell. However I will show you a function that edits the AboutMe user profile property and function that will get all user properties. I will authenticate against the admin portal of SharePoint online and I will be able to play with the properties of other users.
Below you can see both function(for editing AboutMe and gettin profile properties) and everything I do befor that.

[*UPDATE*]: I have published "universal" scripts for editing any User Profile property read more HERE

---

$cDLLS = Get-ChildItem -Path "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI" | Where {$_.Name -notlike "*.Portable.dll"}
ForEach ($dll in $cDLLS)
{
    Add-Type -Path $dll.FullName
}


$username = "******@yankulovdemo.onmicrosoft.com" 
$password = "*******" 
$url = "https://yankulovdemo-admin.sharepoint.com"
$securePassword = ConvertTo-SecureString $Password -AsPlainText -Force

$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $securePassword)
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($url)
$Context.Credentials = $credentials
$Global:oContext = $Context

Function Update-AboutText{
Param(
    [string]$AboutText,
    [string]$UserLogin
)
Process{
    $logIn = ("i:0#.f|membership|" + $UserLogin)
    $ctx = $Global:oContext
    $aboutTextHtml = $AboutText.Replace(([System.Environment]::NewLine), "<br />")
    $peopleManager = New-Object Microsoft.SharePoint.Client.UserProfiles.PeopleManager($ctx)
    $Properties = $peopleManager.GetPropertiesFor($logIn)
    $ctx.Load($Properties)
    $ctx.ExecuteQuery()
    $peopleManager.SetSingleValueProfileProperty($logIn, "AboutMe", $AboutText)
    $ctx.ExecuteQuery()
}
}

Function Get-UserProperties{
Param(
    [string]$UserLogin
)
Process{
    $logIn = ("i:0#.f|membership|" + $UserLogin)
    $ctx = $Global:oContext
    $peopleManager = New-Object Microsoft.SharePoint.Client.UserProfiles.PeopleManager($ctx)
    $user = $peopleManager.GetPropertiesFor($logIn)
    $ctx.Load($user)
    $ctx.ExecuteQuery()
    Write-Output $user.UserProfileProperties

}
}

---

The first thing I do is to load the client dlls. Second, I am getting the client context, as I said against the admin portal and putting it as global variable for further reuse.
After we are ready we can start editing the properties and here is the outcome:

It seems that this worked out. The updated About Me property is shown in Gencho's profile as well.