Sierra Window Focus Loss, Caused by SystemUIServer
I determined that my issue was caused by one of our management profiles.  Specifically the profile used to manage Menu Extras.  For now I've pulled the profile off and my associate is working on updating the profile to hopefully fix our problem while still maintaining management.  The profile in question was the following:

    &lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt;
&lt;plist version="1.0"&gt;
&lt;dict&gt;
    &lt;key&gt;PayloadContent&lt;/key&gt;
    &lt;array&gt;
        &lt;dict&gt;
            &lt;key&gt;PayloadContent&lt;/key&gt;
            &lt;dict&gt;
                &lt;key&gt;com.apple.mcxMenuExtras&lt;/key&gt;
                &lt;dict&gt;
                    &lt;key&gt;Forced&lt;/key&gt;
                    &lt;array&gt;
                        &lt;dict&gt;
                            &lt;key&gt;mcx_preference_settings&lt;/key&gt;
                            &lt;dict&gt;
                                &lt;key&gt;AirPort.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Battery.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Bluetooth.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Clock.menu&lt;/key&gt;
                                &lt;true/&gt;
                                &lt;key&gt;Displays.menu&lt;/key&gt;
                                &lt;true/&gt;
                                &lt;key&gt;DwellControl.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Eject.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;ExpressCard.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;IrDA.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;PPP.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;PPPoE.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;RemoteDesktop.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Script Menu.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;TextInput.menu&lt;/key&gt;
                                &lt;true/&gt;
                                &lt;key&gt;TimeMachine.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;UniversalAccess.menu&lt;/key&gt;
                                &lt;true/&gt;
                                &lt;key&gt;User.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;VPN.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;Volume.menu&lt;/key&gt;
                                &lt;true/&gt;
                                &lt;key&gt;WWAN.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;iChat.menu&lt;/key&gt;
                                &lt;false/&gt;
                                &lt;key&gt;delaySeconds&lt;/key&gt;
                                &lt;real&gt;1&lt;/real&gt;
                            &lt;/dict&gt;
                        &lt;/dict&gt;
                    &lt;/array&gt;
                    &lt;key&gt;mcx_targets&lt;/key&gt;
                    &lt;array&gt;
                        &lt;string&gt;user&lt;/string&gt;
                    &lt;/array&gt;
                &lt;/dict&gt;
            &lt;/dict&gt;
            &lt;key&gt;PayloadEnabled&lt;/key&gt;
            &lt;true/&gt;
            &lt;key&gt;PayloadIdentifier&lt;/key&gt;
            &lt;string&gt;com.mycompany.menuextras&lt;/string&gt;
            &lt;key&gt;PayloadType&lt;/key&gt;
            &lt;string&gt;com.apple.ManagedClient.preferences&lt;/string&gt;
            &lt;key&gt;PayloadUUID&lt;/key&gt;
            &lt;string&gt;36b14197-3388-492c-b7a1-cae748143969&lt;/string&gt;
            &lt;key&gt;PayloadVersion&lt;/key&gt;
            &lt;integer&gt;1&lt;/integer&gt;
        &lt;/dict&gt;
    &lt;/array&gt;
    &lt;key&gt;PayloadDescription&lt;/key&gt;
    &lt;string&gt;Included custom settings: Menu Extras settings.&lt;/string&gt;
    &lt;key&gt;PayloadDisplayName&lt;/key&gt;
    &lt;string&gt;MenuExtra&lt;/string&gt;
    &lt;key&gt;PayloadIdentifier&lt;/key&gt;
    &lt;string&gt;com.mycompany.menuextras&lt;/string&gt;
    &lt;key&gt;PayloadOrganization&lt;/key&gt;
    &lt;string&gt;My Company&lt;/string&gt;
    &lt;key&gt;PayloadRemovalDisallowed&lt;/key&gt;
    &lt;true/&gt;
    &lt;key&gt;PayloadScope&lt;/key&gt;
    &lt;string&gt;System&lt;/string&gt;
    &lt;key&gt;PayloadType&lt;/key&gt;
    &lt;string&gt;Configuration&lt;/string&gt;
    &lt;key&gt;PayloadUUID&lt;/key&gt;
    &lt;string&gt;ae5c4c7c-c354-453b-bd15-d37437b46d2c&lt;/string&gt;
    &lt;key&gt;PayloadVersion&lt;/key&gt;
    &lt;integer&gt;1&lt;/integer&gt;
&lt;/dict&gt;
&lt;/plist&gt;