added and updated missing descriptions

Author: MelanieHom

memdocs/configmgr/develop/osd/how-to-enable-unknown-computer-support-for-a-pxe-service-point.md

@@ -11,6 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
+description: Learn about how to set an operating system deployment response to PXE service requests from unknown computers.
 
 
 ---

memdocs/configmgr/develop/osd/how-to-view-the-properties-for-an-operating-system-image.md

@@ -11,7 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
-description: Learn how to view an image file's properties in XML format using a Microsoft operating system's image package. 
+description: Learn how to view an image file's properties in XML format using a Microsoft operating system's image package.
 
 
 ---

memdocs/configmgr/develop/reference/apps/sms_deploymenttypelicenseassociation-server-wmi-class.md

@@ -11,7 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
-
+description: Learn about the syntax, methods, properties, and requirements of the SMS_DeploymentTypeLicenseAssociation server class.
 
 ---
 # SMS_DeploymentTypeLicenseAssociation Server WMI Class

memdocs/configmgr/develop/reference/misc/sms-adminuicontent-server-wmi-class.md

@@ -11,7 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
-
+descriptions: Learn about the syntax, methods, properties, and requirements of the SMS_AdminUIContent server class.
 
 ---
 # SMS_AdminUIContent Server WMI Class

memdocs/configmgr/develop/reference/sum/setenforcement-method-in-class-sms_softwareupdate.md

@@ -11,7 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
-
+description: Learn how to set policy enforcement rules for software updates by editing the 'SetEnforcement' class method in the Configuration Manager.
 
 ---
 # SetEnforcement Method in Class SMS_SoftwareUpdate

memdocs/configmgr/develop/sum/about-software-updates-deployments.md

@@ -11,7 +11,7 @@ ms.author: aaroncz
 manager: dougeby
 ms.localizationpriority: null
 ms.collection: openauth
-
+description: Learn about how to create software update deployments using the Configuration Manager SDK interfaces to deliver updates to client computers.
 
 ---