add link as suggested

external/general/remote-working/remote-working.md

@@ -24,9 +24,10 @@ The BioCore team uses the following: https://lcsbbioinfocore.slack.com
 
 If you want to hold online (virtual) meetings, you can do so by logging in to
 Cisco Webex Meetings using your university credentials: https://unilu.webex.com
-
 From there, you can schedule your own meetings and/or join existing sessions.
 
+If you need help setting up and using Cisco Webex, you can follow [these instructions](https://using-webex.uni.lu/).
+
 ## Connecting to the university network
 
 If you want to access the university infrastructure, such as the servers or storage, you can do so by connecting