diff --git a/src/pages/how-to/monitor-system-and-network-activity.mdx b/src/pages/how-to/monitor-system-and-network-activity.mdx
index 840f27c2..9288f8b5 100644
--- a/src/pages/how-to/monitor-system-and-network-activity.mdx
+++ b/src/pages/how-to/monitor-system-and-network-activity.mdx
@@ -18,6 +18,12 @@ You can also use the search bar to filter events by activity type.
     The future versions will support connection events that occur in NetBird agents (e.g., peer A connected to peer B).
 </Note>
 
+<Note>
+    The <b>unknown</b> name or e-mail address.
+    In the activity event store, the system keeps the user information in encrypted format. If the encryption key has been corrupted, then in the e-mail address or name fields, it could show "unknown".
+    If the configuration files have been generated by the <b>configure.sh</b> script, then check the backup files in the same folder as the script. Look for the <b>DataStoreEncryptionKey</b> field in the management.json backup files.
+</Note>
+
 ## Get started
 <p float="center" >
     <Button name="button" className="button-5" onClick={() => window.open("https://netbird.io/pricing")}>Use NetBird</Button>