Hey @Dandan
There is a way
you can filter outlook mail by using DASL Query
Please find below sample as per your need
hope it will help you.
it will returned all pending followup item or red flag mail items.
if you wanna read unread follow up mail items then just check unread property along with filter query i have used.
Get Outlook Mails having a flag = Follow Up- Aksh.xaml (5.9 KB)
Regards…!!
Aksh