Some deployments of Cisco Jabber let you control who interacts with you inside your company and outside your company.
From the hub window, open the Settings menu, and go to Options. If you’re on an earlier version of Cisco Jabber for Windows, select instead.
Select the Privacy tab.
Select one of the following options in the Inside my company section:
Select one of the following options in the Outside my company section:
Select Apply and then OK.