Once you have imported your AWS field in eazyBI as property and measures, there would a few new measures created that you can use to calculate the expected result.
It would be something like this for out of office hours
NonZero(
Count(
Filter(
Descendants([Issue].CurrentHierarchyMember,[Issue].[Issue]),
(
Datediffhours(
datewithouttime([Issue].CurrenthierarchyMember.get('Actual Window Start')),
[Issue].CurrenthierarchyMember.get('Actual Window Start'))<6
OR
Datediffhours(
datewithouttime([Issue].CurrenthierarchyMember.get('Actual Window Start')),
[Issue].CurrenthierarchyMember.get('Actual Window Start'))>22
)
AND
[Measures].[Issues with Actual Window Start]>0
)
)
)