explain flat file pollingtime

Author: ekpgh

articles/hpc-cache/directory-services.md

@@ -1,11 +1,11 @@
 ---
 title: Use extended groups in Azure HPC Cache
 description: How to configure directory services for client access to storage targets in Azure HPC Cache
-author: femila
+author: ekpgh
 ms.service: hpc-cache
 ms.topic: how-to
-ms.date: 03/15/2021
-ms.author: femila
+ms.date: 07/27/2022
+ms.author: v-erinkelly
 ---
 
 # Configure directory services
@@ -56,6 +56,8 @@ These values are required if you want to download files with your user and group
 
 ![screenshot of Download details section for a flat file download](media/group-download-details-file.png)
 
+By default, the file is polled for updates once an hour. If you want the HPC Cache to fetch the file immediately, you could consider turning off extended groups (change the **Enable extended groups** setting to **No**) and then back on to cause settings to be reloaded.
+
 ## Configure LDAP
 
 Fill in these values if you want to use a non-AD LDAP source to get user and group credentials. Check with your LDAP administrator if you need help with these values.