Office internal chat system : openfire-spark
Openfire is a powerful instant messaging (IM) and chat server that implements the XMPP protocol.
Download Openfire software from the below link.
http://www.igniterealtime.org/downloads/
You can also download from direct link
http://www.igniterealtime.org/downloads/download-landing.jsp?file=openfire/openfire_3_9_1.exe
You need to install this software on server.
Again you need to download spark IM from the below link.
http://www.igniterealtime.org/downloads/download-landing.jsp?file=spark/spark_2_6_3.exe
You can install this spark IM on client PC.
For any query contact us: info@eduguru.in