diff --git a/O365-Get-ImmutableIDfromUPN/get-ImmutableIDfromUPN.ps1 b/O365-Get-ImmutableIDfromUPN/get-ImmutableIDfromUPN.ps1
new file mode 100644
index 00000000..48a88b48
--- /dev/null
+++ b/O365-Get-ImmutableIDfromUPN/get-ImmutableIDfromUPN.ps1
@@ -0,0 +1,34 @@
+function get-ImmutableIDfromUPN
+{ 
+
+    <#
+    .SYNOPSIS
+        Converts AD User Object GUID to Office 365 Immutable ID
+
+    .DESCRIPTION
+        This function will convert an AD Object GUID to an Office 365 User ImmutableID
+
+    .EXAMPLE
+        get-ImmutableIDfromADObject -UserPrincipalname myuser@contoso.com
+
+    .OUTPUTS
+        String
+
+    .NOTES
+        Anthony Kersten
+
+    .LINK
+        https://github.com/lazywinadmin/PowerShell
+
+
+#>
+
+
+    [CmdletBinding()] Param( 
+        [Parameter(Mandatory=$True,ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)]$UserPrincipalname)  
+   process{  
+        $ADObject =   Get-ADUser -Filter "UserPrincipalName -eq '$UserPrincipalname'"
+        if (!$ADObject.objectguid){$ADObject = get-adobject $AdObject -properties objectGuid} 
+        [system.convert]::ToBase64String($ADObject.objectguid.tobytearray()) 
+    } 
+}