Calendar in the new Outlook and the Outlook app

The new Outlook, the Outlook app and Outlook for Mac can't work with CalDav Synchronizer. This means you can't sync a calendar from your Nextcloud both ways there. You do have a few other options.

Option 1: subscribe to your calendar (view only)

Your Nextcloud can create a subscription link for a calendar. You add this link in Outlook as a calendar from the internet. You'll then see your appointments in Outlook, but you can't change them there.

1. In your Nextcloud, in the Calendar app, create a public link for the calendar and copy the subscription link (see Sharing calendars, making them public and adding them to your website).
2. In the calendar of the new Outlook, choose Add calendar and then Subscribe from web. Paste the link and give the calendar a name.

Outlook refreshes this kind of calendar by itself, sometimes only after a few hours. You'll find more information in Outlook and Nextcloud calendar side by side.

Please note: With a public link, anyone who has the link can view your calendar. Only use this for a calendar without private information. And here too: the new Outlook retrieves the calendar via Microsoft.

Option 2: the calendar in your Nextcloud or on your phone

Use Outlook for your mail and your Nextcloud for your calendar. You open the calendar in your browser, or you add it to the calendar app on your phone (see Calendar and contacts on the iPhone and iPad and Calendar and contacts on Android with DAVx5). On the Mac, you add it to the Calendar app (see Calendar and contacts on the Mac).

Option 3: a different program for mail and calendar

Would you like mail, calendar and contacts together in one program, with your Nextcloud? Then you can use Thunderbird (see Calendar and contacts in Thunderbird), or eM Client (see Connecting your Nextcloud calendar and contacts to eM Client). Or the classic Outlook with CalDav Synchronizer (see Your Nextcloud calendar and contacts in classic Outlook).