diff --git a/src/functions/public/Device/Get-IntuneDeviceLogin.ps1 b/src/functions/public/Device/Get-IntuneDeviceLogin.ps1
index 605c1a5..453cede 100644
--- a/src/functions/public/Device/Get-IntuneDeviceLogin.ps1
+++ b/src/functions/public/Device/Get-IntuneDeviceLogin.ps1
@@ -1,4 +1,6 @@
-function Get-IntuneDeviceLogin {
+#Requires -Modules @{ ModuleName = 'Microsoft.Graph.Authentication'; ModuleVersion = '2.28.0' }
+
+function Get-IntuneDeviceLogin {
     <#
     .SYNOPSIS
     Retrieves logged-on user info for an Intune-managed device by DeviceId, DeviceName, UserPrincipalName, or UserId.
@@ -59,6 +61,7 @@
     PSCustomObject with the following properties
     - DeviceId (string)
     - DeviceName (string)
+    - OperatingSystem (string)
     - UserId (string)
     - UserPrincipalName (string)
     - LastLogonDateTime (datetime)
@@ -168,6 +171,7 @@
                     $user = Resolve-EntraUserById -UserId $entry.userId
                     [PSCustomObject]@{
                         DeviceName        = $device.deviceName
+                        OperatingSystem   = $device.operatingSystem
                         UserPrincipalName = $user.userPrincipalName
                         DeviceId          = $device.id
                         UserId            = $entry.userId
@@ -269,6 +273,7 @@
                         $user = Resolve-EntraUserById -UserId $entry.userId
                         [PSCustomObject]@{
                             DeviceName        = $device.deviceName
+                            OperatingSystem   = $device.operatingSystem
                             UserPrincipalName = $user.userPrincipalName
                             DeviceId          = $device.id
                             UserId            = $entry.userId
@@ -318,7 +323,7 @@
 
                 # Get all managed devices with usersLoggedOn property.
                 # Invoke-GraphGet already handles pagination, so we query once and filter client-side.
-                $uri = "$baseUri`?`$select=id,deviceName,usersLoggedOn"
+                $uri = "$baseUri`?`$select=id,deviceName,operatingSystem,usersLoggedOn"
                 $resp = Invoke-GraphGet -Uri $uri
 
                 $allDevices = @()
@@ -356,6 +361,7 @@
                         $user = Resolve-EntraUserById -UserId $targetUserId
                         [PSCustomObject]@{
                             DeviceName        = $device.deviceName
+                            OperatingSystem   = $device.operatingSystem
                             UserPrincipalName = $user.userPrincipalName
                             DeviceId          = $device.id
                             UserId            = $targetUserId
diff --git a/src/init/initializer.ps1 b/src/init/initializer.ps1
deleted file mode 100644
index 506377a..0000000
--- a/src/init/initializer.ps1
+++ /dev/null
@@ -1 +0,0 @@
-#Requires -Modules @{ ModuleName = 'Microsoft.Graph.Authentication'; ModuleVersion = '2.28.0' }
diff --git a/tests/public/Device/Get-IntuneDeviceLogin.Tests.ps1 b/tests/public/Device/Get-IntuneDeviceLogin.Tests.ps1
index 18736dd..0acec9b 100644
--- a/tests/public/Device/Get-IntuneDeviceLogin.Tests.ps1
+++ b/tests/public/Device/Get-IntuneDeviceLogin.Tests.ps1
@@ -21,6 +21,8 @@ Describe 'Get-IntuneDeviceLogin' {
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testDeviceName = 'DEVICE-001'
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
+            $testDeviceType = 'Windows'
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testUserId = 'u1e1a1d7-2d2b-4d8c-9f0a-0d2a3d1e2f3a'
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testUserPrincipalName = 'user@contoso.com'
@@ -31,9 +33,10 @@ Describe 'Get-IntuneDeviceLogin' {
         It 'Should return a PSCustomObject with logged-on user information' {
             # Arrange
             $mockDevice = [PSCustomObject]@{
-                id            = $testDeviceId
-                deviceName    = $testDeviceName
-                usersLoggedOn = @(
+                id              = $testDeviceId
+                deviceName      = $testDeviceName
+                operatingSystem = $testDeviceType
+                usersLoggedOn   = @(
                     [PSCustomObject]@{
                         userId            = $testUserId
                         lastLogOnDateTime = $testLastLogonDateTime
@@ -56,6 +59,7 @@ Describe 'Get-IntuneDeviceLogin' {
             $result | Should -Not -BeNullOrEmpty
             $result.DeviceId | Should -Be $testDeviceId
             $result.DeviceName | Should -Be $testDeviceName
+            $result.OperatingSystem | Should -Be $testDeviceType
             $result.UserId | Should -Be $testUserId
             $result.UserPrincipalName | Should -Be $testUserPrincipalName
             $result.LastLogonDateTime | Should -BeOfType [datetime]
@@ -210,6 +214,8 @@ Describe 'Get-IntuneDeviceLogin' {
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testDeviceName = 'DEVICE-001'
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
+            $testDeviceType = 'Windows'
+            [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testUserId = 'u1e1a1d7-2d2b-4d8c-9f0a-0d2a3d1e2f3a'
             [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
             $testUserPrincipalName = 'user@contoso.com'
@@ -223,9 +229,10 @@ Describe 'Get-IntuneDeviceLogin' {
             }
 
             $mockDevice = [PSCustomObject]@{
-                id            = $testDeviceId
-                deviceName    = $testDeviceName
-                usersLoggedOn = @(
+                id              = $testDeviceId
+                deviceName      = $testDeviceName
+                operatingSystem = $testDeviceType
+                usersLoggedOn   = @(
                     [PSCustomObject]@{
                         userId            = $testUserId
                         lastLogOnDateTime = '2024-03-05T10:30:00Z'
@@ -248,6 +255,7 @@ Describe 'Get-IntuneDeviceLogin' {
             # Assert
             $result | Should -Not -BeNullOrEmpty
             $result.DeviceName | Should -Be $testDeviceName
+            $result.OperatingSystem | Should -Be $testDeviceType
             $result.UserPrincipalName | Should -Be $testUserPrincipalName
             Assert-MockCalled -CommandName 'Resolve-IntuneDeviceByName' -Times 1 -Exactly
             Assert-MockCalled -CommandName 'Invoke-GraphGet' -Times 1 -Exactly
@@ -585,9 +593,10 @@ Describe 'Get-IntuneDeviceLogin' {
             $mockDevicesResponse = [PSCustomObject]@{
                 value = @(
                     [PSCustomObject]@{
-                        id            = $testDeviceId1
-                        deviceName    = 'DEVICE-001'
-                        usersLoggedOn = @(
+                        id              = $testDeviceId1
+                        deviceName      = 'DEVICE-001'
+                        operatingSystem = 'Windows'
+                        usersLoggedOn   = @(
                             [PSCustomObject]@{
                                 userId            = $testUserId
                                 lastLogOnDateTime = '2024-03-05T10:30:00Z'
@@ -624,6 +633,7 @@ Describe 'Get-IntuneDeviceLogin' {
             $results.Count | Should -Be 1
             $results[0].DeviceId | Should -Be $testDeviceId1
             $results[0].DeviceName | Should -Be 'DEVICE-001'
+            $results[0].OperatingSystem | Should -Be 'Windows'
             $results[0].UserId | Should -Be $testUserId
             $results[0].UserPrincipalName | Should -Be $testUserPrincipalName
         }
@@ -638,9 +648,10 @@ Describe 'Get-IntuneDeviceLogin' {
             $mockDevicesResponse = [PSCustomObject]@{
                 value = @(
                     [PSCustomObject]@{
-                        id            = $testDeviceId1
-                        deviceName    = 'DEVICE-001'
-                        usersLoggedOn = @(
+                        id              = $testDeviceId1
+                        deviceName      = 'DEVICE-001'
+                        operatingSystem = 'Windows'
+                        usersLoggedOn   = @(
                             [PSCustomObject]@{
                                 userId            = $testUserId
                                 lastLogOnDateTime = '2024-03-05T10:30:00Z'
@@ -737,9 +748,10 @@ Describe 'Get-IntuneDeviceLogin' {
             $mockDevicesResponse = [PSCustomObject]@{
                 value = @(
                     [PSCustomObject]@{
-                        id            = $testDeviceId1
-                        deviceName    = 'DEVICE-001'
-                        usersLoggedOn = @(
+                        id              = $testDeviceId1
+                        deviceName      = 'DEVICE-001'
+                        operatingSystem = 'Windows'
+                        usersLoggedOn   = @(
                             [PSCustomObject]@{
                                 userId            = $testUserId
                                 lastLogOnDateTime = '2024-03-05T10:30:00Z'
@@ -1064,9 +1076,10 @@ Describe 'Get-IntuneDeviceLogin' {
             $mockDevicesResponse = [PSCustomObject]@{
                 value = @(
                     [PSCustomObject]@{
-                        id            = $testDeviceId1
-                        deviceName    = 'DEVICE-001'
-                        usersLoggedOn = @(
+                        id              = $testDeviceId1
+                        deviceName      = 'DEVICE-001'
+                        operatingSystem = 'Windows'
+                        usersLoggedOn   = @(
                             [PSCustomObject]@{
                                 userId            = $testUserId
                                 lastLogOnDateTime = '2024-03-05T10:30:00Z'
@@ -1085,8 +1098,12 @@ Describe 'Get-IntuneDeviceLogin' {
             # Assert
             $results.Count | Should -Be 1
             $results[0].DeviceId | Should -Be $testDeviceId1
+            $results[0].OperatingSystem | Should -Be 'Windows'
             $results[0].UserId | Should -Be $testUserId
             $results[0].UserPrincipalName | Should -Be $testUserPrincipalName
+            Assert-MockCalled -CommandName 'Invoke-GraphGet' -Times 1 -Exactly -ParameterFilter {
+                $Uri -match 'managedDevices\?\$select=id,deviceName,operatingSystem,usersLoggedOn'
+            }
         }
 
         It 'Should reject invalid GUID format for UserId' {