/etc/lightdm/lightdm.conf.d/92-arctica-greeter-remote-logon.conf is in arctica-greeter-remote-logon 0.99.0.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [SeatDefaults]
# enforce showing remote login feature
greeter-show-remote-login=true
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