add card on attending webex

external/general/attend-webex/attend-webex.md

+# Attend a webex meeting
+
+If you want to attend a webex meeting, download first the Cisco Webex Client from [here](https://unilu.webex.com).
+**Note:** On macOS, you might have to grant permission first to run the Cisco Webex Client.
+
+You usually have received a link from the organizer to the meeting. If you click on that link, you will get redirected to a page similar to this one:
+
+  ![](img/image1.png)
+
+
+You can then login with your university credentials. Once you logged in, a popup will prompt you to join the meeting:
+
+![](img/image2.png)