Based on your last reply about using an attach queue that is forward the alarms to Moogsoft the answer would be no maintenance would not affect that.
probes send out a message with a subject of alarm. This is picked up by the alarm_enrichment probe and processes then sent back out on the wire as alarm2. NAS then picks this up and this is where maintenance comes in and NAS will suppress it.
if you are sending alarms with alarm subject over to Moogsoft this process has not completed as of yet and is why it is failing.
if you can change the subject message that you are using I would suggest creating an AO profile that posts alarm message to a new subject such as alarm3 or MoogsoftAlarm and have your queue forward this message over that have already been through NAS maintenance mode process.
If you can not do that for some reason you would need to open an enhancement request to have dev look into some other solution.