Update sys-fn-get-audit-file-transact-sql.md

Author: DavidTrigano

docs/relational-databases/system-functions/sys-fn-get-audit-file-transact-sql.md

@@ -123,8 +123,9 @@ fn_get_audit_file ( file_pattern,
 
 
 ## Remarks  
- If the *file_pattern* argument passed to **fn_get_audit_file** references a path or file that does not exist, or if the file is not an audit file, the **MSG_INVALID_AUDIT_FILE** error message is returned.  
-  
+- If the *file_pattern* argument passed to **fn_get_audit_file** references a path or file that does not exist, or if the file is not an audit file, the **MSG_INVALID_AUDIT_FILE** error message is returned.  
+- **fn_get_audit_file** cannot be used when the audit is created with the **APPLICATION_LOG**, **SECURITY_LOG**, or **EXTERNAL_MONITOR** options.
+
 ## Permissions
 
 - **SQL Server**: Requires the **CONTROL SERVER** permission.