"Backup GUP" - option not anymore in 12.1 RU2
The previously existing option for backup gups is no longer existing in SEPM 12.1 RU2 and has been replaced by Explicit GUP functionality.
Backup GUPS as per description:
"Backup" Group Update Provider on a different subnet (if Group Update Providers on the local subnet are unavailable)"
...were allowing for specification of a GUP machine out of the local subnet, that would be asked for updates in case other gups are no longer available.
In RU2 this option is no more. Explicit GUP settings allows only for a strict assignement of subnet clients group to GUP or GUP subnets, and does not allow any backup options like before. In environment with sub/supernetting backup option was really important.
Would be welcome to see the backup option back alongside the explicit GUP functionality.