diff --git a/exchange/exchange-ps/exchange/Add-MailboxPermission.md b/exchange/exchange-ps/exchange/Add-MailboxPermission.md
index 47a39e1221..07ab0e946e 100644
--- a/exchange/exchange-ps/exchange/Add-MailboxPermission.md
+++ b/exchange/exchange-ps/exchange/Add-MailboxPermission.md
@@ -420,7 +420,7 @@ Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Ex
 
 Required: False
 Position: Named
-Default value: None
+Default value: All
 Accept pipeline input: False
 Accept wildcard characters: False
 ```