Bonjour Setup:
Step 1: On the machine acting as the server, open [Preferences > Sync] and press the Bonjour Options button.
Step 2: Click Enable Incoming Connections to use this Mac as a Bonjour server of its databases. Optionally, have closed databases open when a client initiates a sync.
Step 3: Enter a mandatory password. This password is required for other devices to act as a client of DEVONthink’s. If you are working with an IT department who has assigned a port for you, or you have a port you’d specifically like to use, enter it in the Port field. Otherwise, leave this blank and DEVONthink will assign one for you.
The Mac with Bonjour enabled should now be visible as a sync location to other devices on your local network. On the other devices, enable it, enter the password, and you can import databases or sync existing databases directly with it.