Lite-Touch provisioning HA-Cluster

Has anyone ever successfully managed to lite-touch provision an active-passive HA-pair using Sophos Central?

Central says „To add firewalls in an HA pair, enter both serial numbers (primary firewall first) separated by a comma.“ but adding two serial-numbers separated by comma, semicolon or anything else - with or without blank space never results in „Next“ Button being clickable…

Tried a few weeks ago - tried again a few days ago in a different environment - never were able to continue. Only using single serial number.

(tried V18.5, V19, V19MR1 - multiple XGS desktop appliances)

Edited TAGs
[edited by: emmosophos at 9:47 PM (GMT -7) on 5 Oct 2022]