Update storage-files-faq.md

Author: sindamnataraj

articles/storage/files/storage-files-faq.md

@@ -93,6 +93,16 @@ ms.topic: conceptual
   **Does Azure File Sync sync the LastWriteTime for directories? Why isn't the *date modified* timestamp on a directory updated when files within it are changed?**  
     No, Azure File Sync doesn't sync the LastWriteTime for directories. Furthermore, Azure Files doesn't update the **date modified** timestamp (LastWriteTime) for directories when files within the directory are changed. This is expected behavior.
 
+* <a id="afs-avrecalls"></a>
+  **Why is the anti virus software on the AFS server recalling tiered files?**  
+   When users access tiered files, some anti-virus (AV) software may cause unintended file recalls. This occurs if the AV software is not configured to ignore tiered files (those with the RECALL_ON_DATA_ACCESS attribute).
+   Here's what happens:
+   1. A user attempts to access a tiered file.
+   2. The AV software blocks the read handle.
+   3. The AV application then performs its own read to scan the file for viruses.
+     
+  This process may appear as if the AV software is recalling the tiered files, but it's actually triggered by the user's access attempt. To prevent this issue, ensure that your AV vendor configures their software to ignore scanning tiered files with the RECALL_ON_DATA_ACCESS attribute.
+  
 ## Security, authentication, and access control
 
 * <a id="file-auditing"></a>