Calendar updates

I have my work calendar that is on outlook and I want to share the calendar to my nextcloud calendar where most of my calendar events are on. I have linked it and it won’t update the calendar. I even tried following this refresh rate - nextcloud calendar and setting it to "P30M" which did nothing. I thought this was something to do with outlook not updating. I added the outlook calendar to my google calendar and what do you know it seems to update. What should I do?