You can try setup Complex repeat scheduling in the ISAdminConsole/Scheduler page and customize the schedule job to run the service in specified timings by selecting calendar options list.Did you tried that setup?
I tried setting up the complex repeating scheduled service in IS ADMIN scheduler page.
The options in complex repeating scheduled service are weekdays , hours ,minutes.(leaving days and months which are out of scope i guess)
That is if i set mon to friday in weekdays and set every hour ,it would be implied on monday and friday also which i dont want as the there is specific time on mondays and fridays.
Solution: Create a new service which get the current date time stamp; if say time is > 5pm on FRI, just exi[STRIKE]s[/STRIKE]t out of this flow service; set other conditions as needed; as default, run the original scheduled service…