Update Set-ThrottlingPolicyAssociation.md

Author: v-smandalika

exchange/exchange-ps/exchange/Set-ThrottlingPolicyAssociation.md

@@ -16,6 +16,9 @@ This cmdlet is available only in on-premises Exchange.
 
 Use the Set-ThrottlingPolicyAssociation cmdlet to associate a throttling policy with a specific object. The object can be a user with a mailbox, a user without a mailbox, a contact or a computer account.
 
+> [!NOTE]
+> Some parameters in the throttling policy (for example, MessageRateLimit) apply only to the objects which have Mailbox GUID (MBX/Remote MBX) and won't apply to the MailUser.
+
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://docs.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).
 
 ## SYNTAX