Windows updates are not automatically installed onto the Custom Virtual machines (ZAPPs). It is the your responsibility to ensure that the Custom virtual machines are kept upto date with Windows updates/patches.
(as part of the managed service, Windows Updates are applied to the managed Virtual Machines - ZDC, ZFILEMGR3, ZRDP)
We recommend you enable Automatic Windows Updates onto your Custom virtual machines. To get started, Open Server Manager and click Not Configured next to Windows Update.
When the screen shown in Figure 2 appears, click the Turn On Automatic Updates button. Windows will immediately begin looking for any updates that have yet to be applied to your system. The result is shown in Figure 3 where you can see that Windows Update is now enabled and there are updates pending installation.
Windows Update is not currently enabled
Windows Update is enabled as there are updates waiting.
You can control the time at which updates are applied. Bear in mind that some updates require a system restart. To change Windows Update settings, click the Change Settings option at the left side of the screen. This will bring up the Change Settings window, shown in Figure 4.