Noticed that while creating a custom schedule for the 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.x
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 in ITMS 8.6 RU2 release.
The following KB articles list the pointfixes available for pervious ITMS 8.x versions:
CUMULATIVE POST ITMS 8.6 RTM (GA) POINT FIXES
CUMULATIVE POST ITMS 8.6 RU1 POINT FIXES