Users: Where UserPrincipalName Starts With

Retrieving all users where the UserPrincipalName (or UPN) starts with using Microsoft Graph.

PowerShell

Connect-MgGraph -Scopes @('User.Read.All')

$upnPrefixes = @(
    'svc',
    'service'
)
$filter = ''
for ($i = 0; $i -lt $upnPrefixes.Count; $i++) {
    if ($i -eq 0) {
        $filter = "startsWith(userPrincipalName,'$($upnPrefixes[$i])')"
    }
    else {
        $filter += " OR startsWith(userPrincipalName,'$($upnPrefixes[$i])')"
    }
}
$users = Get-MgUser -All -PageSize 999 -Filter $filter

Dependencies

Microsoft Graph SDK for PowerShell

Install-Module Microsoft.Graph -AllowClobber -Force

Connect-MgGraph

Using the Microsoft Graph Command Line Tools Enterprise Application:

Connect-MgGraph -Scopes @('')

Using an existing Access Token:

Connect-MgGraph -AccessToken (ConvertTo-SecureString 'ey..' -AsPlainText -Force)

Using an Application Registration (Platform: Mobile and desktop applications, redirect http://localhost):

Connect-MgGraph -ClientId 'abc..' -TenantId 'abc..'

Using a ClientId and Secret (Password):

$tenantId = ''
$clientId = ''
$secret = ConvertTo-SecureString '' -AsPlainText -Force
$secretCredential = New-Object System.Management.Automation.PSCredential ($clientId, $secret)
$params = @{
    'SecretCredential' = $secretCredential
    'TenantId'         = $tenantId
}
Connect-MgGraph @params