Add config info to quarantine release request

Testing this out on our tenant, trying to configure who receives these alerts. Cannot be done in powershell, apparently.

Author: Yebbenbe

defender-office-365/quarantine-quarantine-notifications.md

@@ -82,7 +82,7 @@ The actions that are available for messages in the quarantine notification depen
 
 - **Request release**: Available for messages that were quarantined by features using a quarantine policy with the **Limited access** permission group or the individual **Allow recipients to request a message to be released from quarantine** (_PermissionToRequestRelease_) permission. For example, custom quarantine policies.
 
-  Selecting the action opens an informational web page that acknowledges the request to release the message from quarantine (**The message release request has been initiated. The tenant admin will determine if the request should be approved or denied.**). The **Release status** value of the message on the **Email** tab of the **Quarantine** page is **Release requested**.
+  Selecting the action opens an informational web page that acknowledges the request to release the message from quarantine (**The message release request has been initiated. The tenant admin will determine if the request should be approved or denied.**). The **Release status** value of the message on the **Email** tab of the **Quarantine** page is **Release requested**. The "Request to release quarantined message" is sent by default to the "TenantAdmin" hidden group - all users with admin privileges. This can be configured within **Threat Policies** > **Alert Policies** through the web portal, but configuring via PowerShell cannot be done without an Enterprise license. 
 
 - **Block Sender**: Available for messages that were quarantined by features using a custom quarantine policy with the **Block sender** (_PermissionToBlockSender_) permission.