Jabber

Jabber is the original name of the Extensible Messaging and Presence Protocol (XMPP), an open standard instant messaging protocol.
Note : The Jabber message output has been removed from new installations of Moodle 4.0. The code for this filter is currently available in the  Plugins directory .
The Jabber service on the Moodle server must be configured before use. To configure Jabber, an XMPP account should be created that is specific to the Moodle server, either on a locally hosted XMPP server or on one of many public servers. The information for this account is entered in Site administration / Plugins / Message outputs / Jabber:
Host – The server to connect to send jabber message notifications – this is entered as the full hostname (e.g. jabber.org) with no protocol (i.e. no “https://”)
Server – XMPP host ID (can be left empty if the same as Jabber host)
Username – The user name to use when connecting to the Jabber server as the Moodle site, without domain name
Password – The password to use when connecting to the Jabber server as the Moodle site.
Port – defaults to 5222
After the Jabber service has been configured, it must also be enabled.
Each Moodle user wishing to receive instant message notifications through Jabber must create an account on a Jabber server and must configure their Moodle account to include those details.
The user must also choose which notifications to receive using Jabber.