Sets the required params for AD to Azure user sync

Fix-AzureUserSync.ps1

#EXAMPLE
#.\Fix-AzureUserSync.ps1 -azSam azureUsername -adSam adUsername -emailDomain test.com

param (
    [Parameter(Mandatory=$false)][string]$azSam,
    [Parameter(Mandatory=$false)][string]$adSam,
    [Parameter(Mandatory=$false)][string]$emailDomain,
    [Parameter(Mandatory=$false)][switch]$help
)



$currentPrincipal = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())
$adminRole = [Security.Principal.WindowsBuiltInRole]::Administrator

if ($currentPrincipal.IsInRole($adminRole)) {
    Write-Host "Script is running as an administrator"
} else {
    Write-Error "Script is not running as an administrator"
    return
}


$test = 0

if ($help) {
    Write-Host "This script connects to Azure AD and On-Premises Active Directory,
    searches for a user with the specified samAccountName,
    and then sets the specified alternate email address and immutableId for the Azure AD user.

    EXAMPLE
    .\Fix-AzureUserSync.ps1 -azSam azureUsername -adSam adUsername -emailDomain test.com
    "
    return
}

if (!$azSam -or !$adSam -or !$emailDomain) {
    Write-Error "Please provide all the required parameters: azSam, adSam, emailDomain"
    return
}

#Check if MSOlService is already connected and don't sign in again if we don't have to
$test = get-msoldomain -ErrorAction SilentlyContinue
IF ($test.count -eq 0)
  {
    Connect-MsolService
  }

#Connect-MsolService
$azUser = Get-MsolUser -SearchString $azSam
if ($azUser -eq $null) {
    Write-Error "Azure AD user with username $azSam not found."
    return
}

$user = get-aduser -Identity $adSam -Properties ObjectGUID
if ($user -eq $null) {
    Write-Error "On-premises AD user with username $adSam not found."
    return
}

$newId = [system.convert]::ToBase64String(([GUID]($user.ObjectGUID)).tobytearray())
$azUser | Set-MsolUser -ImmutableId $newId
if ($?) {
    Write-Host "Successfully set immutableId for Azure AD user $($azUser.UserPrincipalName)."
} else {
    Write-Error "Failed to set immutableId for Azure AD user $($azUser.UserPrincipalName)."
}

$email = $adSam + "@" + $emailDomain
$azUser | Set-MsolUser -AlternateEmailAddresses $email
if ($?) {
    Write-Host "Successfully set alternate email address for Azure AD user $($azUser.UserPrincipalName)."
} else {
    Write-Error "Failed to set alternate email address for Azure AD user $($azUser.UserPrincipalName)."
}

Get-AdUser -Identity $adSam | Set-AdUser -UserPrincipalName $email