Laziness is the true mother of necessity I think in IT, and the tedious act of viewing multiple properties pages brought about this one liner. If you too are setting up diverse deployment sets and need to quickly verify multiple deployments for reboot supression state. Here’s a way to do it in powershell:
gwmi -namespace "root\sms\site_<sitecode>" -query "select assignmentname from sms_updategroupassignment where assignmentname like '%<NAME SEARCH VALUE>%' and suppressreboot = '3'" -ComputerName <SITESERVERNAME> |Select -Property assignmentname
<chopped up for readability sake>
0 = No Suppression
1 = Workstation Suppression
2 = Server Suppression
3 = Server & Workstation Suppression
replace <> values with your relevant search criteria.