In OC 20.3 the only filtering option available for maintenance schedules is the "Status" column.
Unable to FILTER the schedules by name or other attributes.
This is very difficult when there are 100's of schedules defined for any given origin and trying to locate some specific ones by change number or other descriptive data.
Because the sort order is also not working, it is extremely cumbersome to find the right schedules.
Release : 20.3
Component : UIM MAINTENANCE MODE
Please upgrade to OC 20.3.2 as issue is resolved in this version