We are running Spectrum in Fault Tolerant mode.
If we are connected to the Secondary SpectroServer due to an issue with the Primary, when trying to create a maintenance mode schedule we are seeing the error:
'The schedule could not be created in the following landscapes:
(DX NetOPS Spectrum 20.2)
You can not create schedules when the Secondary SpectroServer is active.
This is a limitation and currently, there is no workaround. You will need to switch back to the Primary SpectroServer in order to create a schedule.