With multiple networks, I also would add a new SM network on the dashboard. There you enroll the devices that need to use the new SSID. For this enrollment, you need a connection to the internet, This could be done with the registration SSID, a wired connection, or even mobile data. The registration process is described quite well in the dashboard. You know you need an SM license for every device enrolled? After that you create a new Tag in SM, use this Tag in the Sentry-Config and apply the Tag to the devices (also in the SM config). The enrolment can also be done as a self-service by the users.
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