Unlike other third party calendars (e.g. Google Calendar and Apple Calendar), Outlook does not accept the time zone settings from the Calendar link, generated from iStudiez Pro.

That's the peculiarity of Outlook.

Please do the following to export your schedule from iStudiez Pro to Outlook:

1. Go to iStudiez Pro > Settings/Preferences > Calendars > Advanced > Generate New URL - generate the new link

2. You will get the link, that looks like this one:

webcal://node1.istudentapp.com/vcal.php?key=abcd1234567efghijk8901lmnopqrstu&tzid=TIME%2FZONE

3. Delete "&tzid=TIME%2FZONE" part from the link and add "&ms=1" instead.

So it would look like this way: 

webcal://node1.istudentapp.com/vcal.php?key=abcd1234567efghijk8901lmnopqrstu&ms=1

4. Delete your previous Calendar URL from Outlook and add the new one (from step 3) instead.

5. Wait up to 3-5 minutes.

It should help.