The customer noticed that while creating a custom schedule for their Software Delivery Task or Windows System Assessment Scan policy, it will fail with "Monthly trigger is missing week or contains week with invalid value"
Steps to reproduce.
ITMS 8.6, 8.6 RU1
Known issue. Both Patch and Software Management Framework agents use the newer scheduler to schedule the tasks.
The newer scheduler has been fixed to correctly process comma-delimited weeks.
This issue has been resolved with our ITMS 8.6 RU2 release.
For a pointfix for those still in ITMS 8.6 RU1, please refer to KB 221269 "CUMULATIVE POST ITMS 8.6 RU1 POINT FIXES"