Brosix supports archiving through the external service Smarsh.
When activated, this option allows all of your user activity logs to be copied for archiving into your Smarsh account. Your data will still be available on Brosix servers, and you can access it from the Brosix Web Control Panel. You need to first have a Smarsh account in order to receive the data from Brosix.
In order to activate this option please follow these instructions:
Integration with Smarsh archiving is a feature of Brosix Enterprise.
You can find more details about Brosix Chat History Archive here.