Requirements

• You have access to the calendar mailbox (user or resource calendar).

• Outlook on the web (OWA) is available (Microsoft 365 or Exchange on-premises).

• “Publish a calendar” is not disabled by policy in your organisation (this is often controlled by an admin).

Option A: Microsoft 365 / Outlook on the web (recommended)

1. Open Outlook on the web and switch to the calendar view.

2. Open Settings (gear icon) → View all Outlook settings.

3. Select Calendar → Shared calendars.

4. In the “Publish a calendar” section:

   • select the calendar

   • choose the level of detail (e.g. “Can view when I’m busy” vs. “Can view all details”)

5. Click Publish.

6. Two links are shown:

   • HTML link (view in the browser only)

   • ICS link (this is the iCal feed) → copy the ICS URL.

You can then add this ICS URL in Doorzign as an iCal source. Here’s how: Set up iCal Connect

Option B: Exchange on-premises (OWA) – similar to Microsoft 365

With Exchange Server (e.g. 2016/2019) the process in OWA is usually very similar:

1. Open OWA → Calendar

2. Settings → Calendar / Shared calendars

3. Publish calendar → choose calendar and level of detail → Publish

4. Copy the ICS link (iCal feed)

Note: Depending on the Exchange version and UI, the menu labels may differ slightly; the feature is usually called “Publish calendar”.