Update New-CsTeamsFilesPolicy.md

Author: gramirez-msft

teams/teams-ps/teams/New-CsTeamsFilesPolicy.md

@@ -17,8 +17,8 @@ The policies also specify third party app id to allow file storage(eg. Box).
 
 ```powershell
 New-CsTeamsFilesPolicy [-NativeFileEntryPoints <String>] [-SPChannelFilesTab <String>]
- [-DefaultFileUploadAppId <String>] [-FileSharingInChatswithExternalUsers <String>] [-Identity] <String>
- [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]
+ [-DefaultFileUploadAppId <String>] [-FileSharingInChatswithExternalUsers <String>] [-AutoShareFilesInExternalChats <String>]
+ [-Identity] <String> [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]
 ```
 
 ## DESCRIPTION
@@ -114,6 +114,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -AutoShareFilesInExternalChats
+
+Indicates if file scope will be changed automatically when sharing files and loops in chats with external or guest users.
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -SPChannelFilesTab
 
 Indicates whether Iframe channel files tab is enabled, if not, integrated channel files tab will be enabled.