SummaryChanging the Next Boot Partition via web UI is straightforward, but it can also be done through CLI as well.
OverviewChanging the partition that is going to boot next can be done on the web UI via Configuration > System > Maintenance, on the "Firmware Update" tab. There is a button that grants the ability to change the boot partition to whichever one is not currently set to be booted next.
If unable to perform this through the web UI - whether it's a case of the web UI not being accessible, or being blocked at the location, this behaviour can also be invoked through the CLI by using the following commands:
exinda > en
exinda # conf t
exinda (config) # image boot location [1 | 2]
The number 1 or 2 correspond to partition 1 or partition 2. The command 'show boot' will show the partition that is set to boot next.