@ArdianP3 can you confirm that your client is using 8.6? The screenshots seems to indicate a different UI label.
I believe I found a known UI issue and the option that says “every weekday” should say “every day” and the other option should be “Every weekday or every nth day”.
When you select “Every day or every nth day”, the label that is revealed says "Every weekday or every __ day(s).
Also, in the activity “CreateRecurringDailySchedule”, there are 2 code paths. One for “Every day”, and then another for “every weekday or every n days”. so because of those, we believe that this is an issue with the labels being flipped.
When we select the “Every day or every nth day” option, and leave the ## days: field blank, it will schedule for every weekday correctly.
Please note that the issue is fully-corrected in Pega 8.7.
As Marije explained the option that is labeled ‘Every day or every nth day’ will give you the behavior you are looking for. In the sub-option you should leave the input box between ‘every’ and ‘day(s)’ blank. Also, once the ‘Run’ action is taken you will see a list of schedule runs in the ‘Upcoming Runs’ section. You can use this to verify that the schedule is what you expect.
Thank you for pointing out the discrepancy between the interface and the documentation. I will coordinate with our documentation team to get this addressed.