diff --git a/lib/ansible/modules/windows/win_iis_webapplication.ps1 b/lib/ansible/modules/windows/win_iis_webapplication.ps1
index e576dd5081..5262c67da3 100644
--- a/lib/ansible/modules/windows/win_iis_webapplication.ps1
+++ b/lib/ansible/modules/windows/win_iis_webapplication.ps1
@@ -20,100 +20,82 @@
 # WANT_JSON
 # POWERSHELL_COMMON
 
-$params = Parse-Args $args;
+$params = Parse-Args $args -supports_check_mode $true
+$check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false
 
-# Name parameter
-$name = Get-Attr $params "name" $FALSE;
-If ($name -eq $FALSE) {
-    Fail-Json (New-Object psobject) "missing required argument: name";
+$name = Get-AnsibleParam -obj $params -name "name" -type "str" -failifempty $true
+$site = Get-AnsibleParam -obj $params -name "site" -type "str" -failifempty $true
+$state = Get-AnsibleParam -obj $params -name "state" -type "str" -default "present" -validateset "absent","present"
+$physical_path = Get-AnsibleParam -obj $params -name "physical_path" -type "str" -aliases "path"
+$application_pool = Get-AnsibleParam -obj $params -name "application_pool" -type "str"
+
+$result = @{
+  application_pool = $application_pool
+  changed = $false
+  physical_path = $physical_path
 }
 
-# Site
-$site = Get-Attr $params "site" $FALSE;
-If ($site -eq $FALSE) {
-    Fail-Json (New-Object psobject) "missing required argument: site";
-}
-
-# State parameter
-$state = Get-Attr $params "state" "present";
-$state.ToString().ToLower();
-If (($state -ne 'present') -and ($state -ne 'absent')) {
-  Fail-Json $result "state is '$state'; must be 'present' or 'absent'"
-}
-
-# Path parameter
-$physical_path = Get-Attr $params "physical_path" $FALSE;
-
-# Application Pool Parameter
-$application_pool = Get-Attr $params "application_pool" $FALSE;
-
-
 # Ensure WebAdministration module is loaded
 if ((Get-Module "WebAdministration" -ErrorAction SilentlyContinue) -eq $null) {
   Import-Module WebAdministration
 }
 
-# Result
-$result = New-Object psobject @{
-  application = New-Object psobject
-  changed = $false
-};
-
 # Application info
 $application = Get-WebApplication -Site $site -Name $name
 
 try {
   # Add application
-  If(($state -eq 'present') -and (-not $application)) {
-    If ($physical_path -eq $FALSE) {
-      Fail-Json (New-Object psobject) "missing required arguments: physical_path"
+  if (($state -eq 'present') -and (-not $application)) {
+    if (-not $physical_path) {
+      Fail-Json $result "missing required arguments: path"
     }
-    If (-not (Test-Path $physical_path)) {
-      Fail-Json (New-Object psobject) "specified folder must already exist: physical_path"
+    if (-not (Test-Path -Path $physical_path)) {
+      Fail-Json $result "specified folder must already exist: path"
     }
 
-    $application_parameters = New-Object psobject @{
-      Site = $site
+    $application_parameters = @{
       Name = $name
       PhysicalPath = $physical_path
-    };
+      Site = $site
+    }
 
-    If ($application_pool) {
+    if ($application_pool) {
       $application_parameters.ApplicationPool = $application_pool
     }
 
-    $application = New-WebApplication @application_parameters -Force
+    if (-not $check_mode) {
+        $application = New-WebApplication @application_parameters -Force
+    }
     $result.changed = $true
-
   }
 
   # Remove application
   if ($state -eq 'absent' -and $application) {
-    $application = Remove-WebApplication -Site $site -Name $name
+    $application = Remove-WebApplication -Site $site -Name $name $WhatIf:$check_mode
     $result.changed = $true
   }
 
   $application = Get-WebApplication -Site $site -Name $name
-  If($application) {
+  if ($application) {
 
     # Change Physical Path if needed
-    if($physical_path) {
-      If (-not (Test-Path $physical_path)) {
-        Fail-Json (New-Object psobject) "specified folder must already exist: physical_path"
+    if ($physical_path) {
+      if (-not (Test-Path -Path $physical_path)) {
+        Fail-Json $result "specified folder must already exist: path"
       }
 
       $app_folder = Get-Item $application.PhysicalPath
       $folder = Get-Item $physical_path
-      If($folder.FullName -ne $app_folder.FullName) {
-        Set-ItemProperty "IIS:\Sites\$($site)\$($name)" -name physicalPath -value $physical_path
+      if ($folder.FullName -ne $app_folder.FullName) {
+        Set-ItemProperty "IIS:\Sites\$($site)\$($name)" -name physicalPath -value $physical_path -WhatIf:$check_mode
         $result.changed = $true
       }
     }
 
     # Change Application Pool if needed
-    if($application_pool) {
-      If($application_pool -ne $application.applicationPool) {
-        Set-ItemProperty "IIS:\Sites\$($site)\$($name)" -name applicationPool -value $application_pool
+    if ($application_pool) {
+      if ($application_pool -ne $application.applicationPool) {
+        Set-ItemProperty "IIS:\Sites\$($site)\$($name)" -name applicationPool -value $application_pool -WhatIf:$check_mode
         $result.changed = $true
       }
     }
@@ -122,11 +104,11 @@ try {
   Fail-Json $result $_.Exception.Message
 }
 
-# Result
+# When in check-mode or on removal, this may fail
 $application = Get-WebApplication -Site $site -Name $name
-$result.application = New-Object psobject @{
-  PhysicalPath = $application.PhysicalPath
-  ApplicationPool = $application.applicationPool
+if ($application) {
+  $result.physical_path = $application.PhysicalPath
+  $result.application_pool = $application.ApplicationPool
 }
 
 Exit-Json $result
diff --git a/lib/ansible/modules/windows/win_iis_webapplication.py b/lib/ansible/modules/windows/win_iis_webapplication.py
index 25b7455e4a..ae17af33b3 100644
--- a/lib/ansible/modules/windows/win_iis_webapplication.py
+++ b/lib/ansible/modules/windows/win_iis_webapplication.py
@@ -22,49 +22,36 @@ ANSIBLE_METADATA = {'metadata_version': '1.0',
                     'status': ['preview'],
                     'supported_by': 'community'}
 
-
 DOCUMENTATION = r'''
 ---
 module: win_iis_webapplication
 version_added: "2.0"
-short_description: Configures IIS web applications.
+short_description: Configures IIS web applications
 description:
-     - Creates, removes, and configures IIS web applications.
+- Creates, removes, and configures IIS web applications.
 options:
   name:
     description:
-      - Name of the web application.
+    - Name of the web application.
     required: true
-    default: null
-    aliases: []
   site:
     description:
-      - Name of the site on which the application is created.
+    - Name of the site on which the application is created.
     required: true
-    default: null
-    aliases: []
   state:
     description:
-      - State of the web application.
-    choices:
-      - present
-      - absent
-    required: false
-    default: null
-    aliases: []
+    - State of the web application.
+    choices: [ absent, present ]
+    default: present
   physical_path:
     description:
-      - The physical path on the remote host to use for the new application. The specified folder must already exist.
-    required: false
-    default: null
-    aliases: []
+    - The physical path on the remote host to use for the new application.
+    - The specified folder must already exist.
   application_pool:
     description:
-      - The application pool in which the new site executes.
-    required: false
-    default: null
-    aliases: []
-author: Henrik Wallström
+    - The application pool in which the new site executes.
+author:
+- Henrik Wallström
 '''
 
 EXAMPLES = r'''
@@ -75,3 +62,16 @@ EXAMPLES = r'''
     state: present
     physical_path: C:\apps\acme\api
 '''
+
+RETURN = r'''
+application_pool:
+    description: The used/implemented application_pool value
+    returned: success
+    type: string
+    sample: DefaultAppPool
+physical_path:
+    description: The used/implemented physical_path value
+    returned: success
+    type: string
+    sample: C:\apps\acme\api
+'''