Good evening Philip and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the issue you have been experiencing with trying to import the .ics file in Outlook.
I would love to try to help you with this topic.
As a first troubleshooting step, could you please provide us with your system information in a private reply ? (following the instructions found in the link)
It would also be great if you could provide me with a screenshot of your timezone settings for both WordPress and the Events Calendar (found under Events -> Settings)
Finally, could you tell me what are the steps you are following to import the ics file in Outlook ?
Best regards,
Geoff B.