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More often than not, the Desktop Support group will be adding new desktop computers and laptops to be managed under the Enterprise Console and the Windows Services Group will be adding the servers to the Enterprise Console, but this document roughly outlines the installation process to get unmanaged, unassigned systems into the Sophos Enterprise Console for further management.
NOTE: During a "Pull" Installation -- The installation command line will initiate the installation. When the installation windows disappear, the person installing may mistake the installation to be complete and log out. However, if you <Right Click> on the Sophos icon in the System Tray, you will notice an option, View Updating Status. If you select that option, you can observe the rest of the installation, which will take about 2 more minutes before you can logout.