Update Set-MalwareFilterPolicy.md

Issue #10999

Author: chrisda

exchange/exchange-ps/exchange/Set-MalwareFilterPolicy.md

@@ -45,6 +45,7 @@ Set-MalwareFilterPolicy [-Identity] <MalwareFilterPolicyIdParameter>
  [-FileTypeAction <FileTypeFilteringAction>]
  [-FileTypes <String[]>]
  [-InternalSenderAdminAddress <SmtpAddress>]
+ [-IsPolicyOverrideApplied <Boolean>]
  [-MakeDefault]
  [-QuarantineTag <String>]
  [-WhatIf]
@@ -605,6 +606,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -IsPolicyOverrideApplied
+This parameter is reserved for internal Microsoft use.
+
+```yaml
+Type: Boolean
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online, Exchange Online Protection
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -MakeDefault
 The MakeDefault switch makes this malware filter policy the default policy. You don't need to specify a value with this switch.