Hi, When you configure an escalation for a task (ie. 2 days), does it look

No, Its depends on # of days from task activation.

Is there any way to configure it so that it takes into account the calendar non-working days?

You may use following steps to do it:
1. Use custom calendar to mark holidays
2. Use following code to calculate non working days and escalation deadline
with(
local!days:fn!enumerate(ri!days)+today(),
local!nonWorkDays:fn!apply(fn!calisworkday,local!days),
local!NWDCount:fn!count(fn!wherecontains(false(),local!nonWorkDays)),
ri!days+local!NWDCount)

3. Currently fn!calIsWorkDay() shall return weekend and non working day. You may use your custom calendar for personalized holidays.

Here ri!days are # of days after which form should be escalated.

Or you could just use caladddays()...?

caladddays() would be appropriate. It will automatically take into account weekends and non working days. You can even pass the specific calendar you want to use. If you want it to be even more precise use caladdhours() which will exclude non-working hours also.