OIC Gen3 - iCal Expression - Schedule Integration 1st Weekday of a Month

Hello Oracle Cloud Community,

I am working with OIC Gen3 and need help creating an iCal (RRULE) expression for scheduling an integration.

Requirement: trigger the integration on the first weekday (Monday–Friday) of every month.

Currently, I am using the following iCal expression:

FREQ=MONTHLY;BYMONTHDAY=1;BYHOUR=7;BYMINUTE=0;BYSECOND=0;

However, this schedules the integration on the 1st day of the month, regardless of whether it falls on a weekend.

Is there an iCal expression or recommended approach to schedule the integration specifically on the first weekday of each month?
If not, what workarounds or best practices do you suggest for this scenario in OIC Gen3?