Hi,

You can disable the Chat feature from CLI using:

root@mail:~# su - zextras -c "carbonio prov mc default carbonioFeatureChatsEnabled FALSE"
root@mail:~# systemctl restart carbonio-ws-collaboration

To enable it again:

root@mail:~# su - zextras -c "carbonio prov mc default carbonioFeatureChatsEnabled TRUE"
root@mail:~# systemctl restart carbonio-ws-collaboration 

These commands enforce on COS level. But if you want to disable Chat on specific user account, use this:

root@mail:~# su - zextras -c "carbonio prov ma sharif@democe.local carbonioFeatureChatsEnabled FALSE"
root@mail:~# systemctl restart carbonio-ws-collaboration 

Use FALSE/TRUE to disable/enable the feature.

Meanwhile, I will discuss with the team to understand if disabling chat from Admin Panel possible or not.

Regards,