Ubiquiti AMPLIFI User Manual page 38

Chapter 8: Guest
Share Tap to share the guest network name or SSID. Tap
the appropriate option, or tap Cancel to exit.
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Start Tap to enable the guest network.
Stop Tap to disable the guest network.
Settings
Tap to access the wireless settings for more
configuration options, including wireless security options.
Indefinitely
Tap to remove the time limit for guest
access. If the guest network was inactive, you can tap this
option to immediately enable the guest network.
AmpliFi User Guide