Update missed file from doc-stub

Author: zallison22

api-reference/beta/resources/customSecurityAttributeExemption.md

@@ -15,7 +15,12 @@ Namespace: microsoft.graph
 [!INCLUDE [beta-disclaimer](../../includes/beta-disclaimer.md)]
 
 Configuration object to configure a custom security attribute exemption for a restriction on application management policies.
+This is an abstract type.
 
+
+Inherits from [entity](../resources/entity.md).
+
+<!-- The direct access methods are not functional in the underlying Service. Excluding them until they are operational.
 ## Methods
 |Method|Return type|Description|
 |:---|:---|:---|
@@ -24,12 +29,13 @@ Configuration object to configure a custom security attribute exemption for a re
 |[Get](../api/customsecurityattributeexemption-get.md)|[customSecurityAttributeExemption](../resources/customsecurityattributeexemption.md)|Read the properties and relationships of a [customSecurityAttributeExemption](../resources/customsecurityattributeexemption.md) object.|
 |[Update](../api/customsecurityattributeexemption-update.md)|[customSecurityAttributeExemption](../resources/customsecurityattributeexemption.md)|Update the properties of a [customSecurityAttributeExemption](../resources/customsecurityattributeexemption.md) object.|
 |[Delete](../api/appmanagementpolicyactorexemptions-delete-customsecurityattributes.md)|None|Delete a [customSecurityAttributeExemption](../resources/customsecurityattributeexemption.md) object.|
+-->
 
 ## Properties
 | Property                  | Type                                           | Description                 |
 | :-------------------------| :--------------------------------------------- | :-------------------------- |
-| id                        | String                                         | Unique identifier with combination of the custom security attribute set name and attribute name. For example, `AttributeSetName_AttributeName` |
-| operator                  | customSecurityAttributeComparisonOperator      | If `equals`, the customSecurityAttributeExemption value is compared to match the custom security attribute value for the exemption to be applied. The comparison is case sensitive. |
+| id                        | String                                         | Unique identifier with combination of the custom security attribute set name and attribute name. For example, `AttributeSetName_AttributeName`. Inherited from [entity](../resources/entity.md). |
+| operator                  | customSecurityAttributeComparisonOperator      | The possible values are: `equals`, `unknownFutureValue`. If `equals`, the customSecurityAttributeExemption value is compared to match the custom security attribute value for the exemption to be applied. The comparison is case sensitive. |
 
 ## Relationships
 Inherited by [customSecurityAttributeStringValueExemption](customSecurityAttributeStringValueExemption.md).