Update Export-ContentExplorerData.md with Aggregate parameter details

Author: chrisda

exchange/exchange-ps/exchange/Export-ContentExplorerData.md

@@ -98,16 +98,19 @@ Accept wildcard characters: False
 ```
 
 ### -Aggregate
+**Note:** This parameter is currently in Private Preview, isn't available in all organizations, and is subject to change.
+
 The Aggregate parameter switch returns the folder level aggregated numbers instead of returning details at the item level. You don't need to specify a value with this switch.
 
 Using this switch significantly reduces the export time. To download the items in a folder, run this cmdlet for specific folders.
 
-When you use this switch with the TagName, TagType and Workload parameters, the command returns the following information:
+When you use this switch with the TagName, TagType, and Workload parameters, the command returns the following information:
+
+- SharePoint and OneDrive: The list of SiteUlrs.
+- Exchange Online and Microsoft Teams: The list of UPNs.
+- The count of items in the folders stamped with relevant tag.
 
-- list of SiteUlrs (for OneDrive and SharePoint) / list of UPNs (for Exchange Online and Teams)
-- The count of items in the folders stamped with relevant tag
 
-**Note:** This parameter is currently in private preview 
 
 ```yaml
 Type: SwitchParameter