End User are receiving alert even when server are set in Maintenance mode under UIM.
UIM : 20.3.3
NAS 9.32
MM 20.31
subscr_block_size = 100 it means when this key is configured, nas will process the alarms in bulk.. but it will not check if the device is in maintenance or not and that is why the alarms were getting generated.
Removed the subscr_block_size = 100 from nas.cfg and restart the NAS.