No Ticket Needed

Appearance

3 min fix 3 min read Recently reviewedBeginner

By , IT support technician

Quick Answer

Click the Calendar icon on the left sidebar, click Add calendar > Add from directory, and type the name of your coworker or the shared mailbox.

How to Fix Missing Shared Calendars in "New" Outlook ​

Estimated Time to Fix: 3 minutes

Applies to: New Outlook for Windows
Article Type: Troubleshooting
Last Updated: 2026-07-20

Summary ​

Microsoft is actively pushing users to switch from "Classic" Outlook to the "New" Outlook for Windows. While the new version is faster, it occasionally fails to migrate your saved Shared Calendars (the calendars of your coworkers or team resources). If you flip the "Try the New Outlook" switch and your calendars are suddenly missing, you don't need to switch back. You need to manually add them again.

Prerequisites ​

  • You must be using the "New" Outlook for Windows (it has a simplified ribbon and looks very similar to Outlook on the Web).

Instructions ​

1. Add a Coworker's Calendar ​

If you previously had access to view a coworker's calendar, you need to search for their name to pin it back to your sidebar.

  1. Open the New Outlook.
  2. Click the Calendar icon on the far left navigation bar.
  3. On the left side of the screen, under the small month calendar, look for a button that says Add calendar. Click it.
  4. In the menu that pops up, select Add from directory.
  5. Select your own email account from the dropdown.
  6. In the search box, type the name or email address of the coworker whose calendar you want to view.
  7. Select their name from the directory list.
  8. Choose which calendar group to add it to (e.g., "People's calendars").
  9. Click Add.

2. Add a Shared Mailbox Calendar ​

If your team uses a shared mailbox (e.g., [email protected]) and you need its calendar, the process is slightly different.

  1. Click the Add calendar button.
  2. Select Add from directory.
  3. Type the email address of the shared mailbox.
  4. Select it from the list.
  5. If you have the correct permissions, it will be added to your list.

3. Ensure the Calendar is Checked ​

Sometimes the calendar successfully migrates, but New Outlook unchecks the box by default.

  1. Look at the left sidebar in the Calendar view.
  2. Scroll down past "My calendars" to People's calendars or Other calendars.
  3. Click the small arrow > next to those group names to expand them.
  4. If you see the missing calendar listed there, click the empty circle next to it so it shows a checkmark. The calendar will appear on your screen.

Troubleshooting ​

TIP

If you heavily rely on highly complex calendar permissions, "Delegate" access, or custom COM add-ins, the New Outlook might not fully support your workflow yet. You can always toggle the "New Outlook" switch in the top right corner to Off to return to the Classic version.

Symptom / ErrorPotential CauseSolution
"You don't have permission to view this calendar"Missing permissionsWhen you switched to New Outlook, the server realized you never actually had official permission; you were relying on a cached glitch in the old app. Ask the calendar owner to re-share it with you.
The "Add calendar" button doesn't do anythingSync glitchClose Outlook completely. Open it again and wait 60 seconds for it to fully sync with the cloud before clicking the button.