Give another person access to your calendar account In the Calendar app on your Mac, choose Calendar Preferences, then click Accounts. Select the calendar account. Click Delegation, click Edit then click the Add button.
Open Outlook Web App, login as the user above and then open the Shared mailbox account (click on user's name in top right corner and select Open Another Mailbox) Switch to the Calendar view, click Share in the top bar and share the Calendar with the user giving Can Edit permission.

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Original KB number: 2876443

Symptoms

A user grants you Free/Busy permission to their calendar, but when you try to open that user's calendar in Microsoft Outlook 2016 for Mac or Outlook for Mac 2011, you receive the following error message:

Outlook cannot open the folder. You do not have permission to open this folder. Contact <user_name> for permission.

Shared Calendar does not work in Outlook 365 for Mac It's very new that I'm working with Outlook 365 for Mac and I have a problem with the shared calendar feature. When I open a calendar from a colleague that has shared his calendar with me, I can not see the entries in his calendar.

Cause

Outlook for Mac cannot open another user's calendar when the user's Calendar folder permission level is set to Free/Busy. This feature is available only in Outlook 2010 and Outlook 2013 for Windows.

For more information, see Calendar permissions differences in Outlook 2007, Outlook 2010 and Outlook 2013.

Resolution

To open a shared calendar in Outlook for Mac, the user must grant you permissions of Reviewer or higher. Or, you can view the user's Free/Busy information by creating a new meeting request and then adding that user in the Scheduling Assistant.

This article explains how you can share a calendar stored in one application with other applications.

Most calendar applications support the iCalendar format (also called iCal or ICS format or IETF standard RFC 5545 if you're a real geek).This provides a standard way to allow an application to 'view' calendars stored within other applications, which is more convenient than manually maintaining two versions of the same calendar, or switching between multiple apps.For example you might want to view your Google calendar from within an iPhone application, or your Zoho calendar from within Outlook.com.
Don't have a calendar yet? No problem - it's easy to set up a new calendar.

How sharing calendars works

Essentially Application A 'publishes' a calendar, which Application B (and any other iCalendar compatible application) can then 'subscribe' to.iCalendar (iCal) is the common format that allows the two to exchange event info via a data feed.

-- Publish ->

<- Subscribe --

In order to share your calendar with another application you need a unique URL (web address).This link gives read-only access to the calendar data so be sure to only give it to people/applications you want to share it with.It's important to note that because access is read-only, other apps will only be able to view data, not change it.

Step-by-step guides

We've produced a simple guides to sharing calendars using the most popular apps. If yours isn't on the list let us know and we'll do our best to add it to the article.

What calendar application do you use?

iCloud (iPhone, iPad, Mac)

How To Request A Shared Calendar In Office For Mac

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Google Calendar - how to share your calendar

Google Calendar is used by both individuals and businesses.And what's not to like? It's free, simple to use and easy to share.If you want to share a Google calendar with another application just follow these instructions:

Log in to your Google account
Go to Google Calendar (opens new window)
Click on the Settings menu cog button and select Settings
Under Settings for my calendars click on the calendar you want to share
Scroll down to the Integrate section
Select the url labelled Secret address in iCal format and copy it (Can't see the link? Click here)
This is the link to your Google calendar for use in iCalendar applications

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iCloud - how to share your calendar (iPhone, iPad, Mac)

If you have an iPhone, iPad, Mac or other Apple device you've probably set up an iCloud account (if not you can do so for free).iCloud allows you to share and sync your content across devices, including calendar information.For each calendar it provides a web address for connecting with other compatible applications.

Private Calendars can only be shared with other iCloud users but Public Calendars provide a unique address for use by any app, which is the method outlined here.Note that although they are called Public calendars, only people you give the address to can view your calendar, not everyone.

Log in to your iCloud account (opens new window)
Go to the iCloud Calendar app
Choose the calendar containing your client appointments from the list on the left (click the circular settings icon next to the name)
From the Share Calendar menu choose Public Calendar
Select the url
This is the link to your iCloud calendar that can be used in any iCalendar compatible application

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Office/Outlook - how to share your calendar

What verions of Office/Outlook are you using?

Outlook.com (formerly known as Hotmail)
Microsoft Outlook 2016 (requires Exchange Server)
Microsoft Outlook 2013 (requires Exchange Server)
Microsoft Outlook 2010 (requires Exchange Server)

Note: If using Outlook with an Exchange server or Office 365, calendar publishing may not be enabled for your account. Please contact your system admin if not.

Step 1: Publishing a Calendar in Office 365

To share your calendar with users or applications outside your organization with Office 365 follow these steps:

Click on the Calendar app
Open the Calendar Settings menu by clicking the cog icon (bar at top, on the right)
Click Options (bottom of the menu)
Click on the Calendar publishing option (found under Calendar > Shared Calendars)
Select the calendar you want to use from the drop-down menu
Go to the section called Shows availability, titles and locations
Copy the ICS link
This is the link you need to paste into the ics compatible application that you want to share your calendar with

Step 1: Publishing a Calendar in Outlook.com (formerly Hotmail)

To share your calendar using Outlook.com (or Office Online) follow these steps:

Click on the Calendar icon to open Outlook Calendar (you can also click on the App loader button in the top-left, and select the Calendar app that way)
Open the Calendar Settings menu by clicking the cog icon (found in the top bar, on the right)
Select Options (at the bottom of the settings menu)
Click on the Calendar publishing option (found under Calendar > Shared Calendars)
Select the calendar you want to publish from the drop-down menu
Go to the section called Shows availability, titles and locations
Copy the ICS link
This is the link you need to paste into the application you want to share the calendar with

Step 1: Publishing a Calendar in Outlook 2016

Mac 21 manual. Important: Publishing an Outlook 2016 calendar is only possible if your organization uses Office 365 or Microsoft Exchange.

To share your calendar using Outlook/Exchange 2016 just follow these steps:

In Outlook go to the Calendars section, right-click on the relevant calendar and choose Share > Publish This Calendar..
Enter your email address and password and Sign In to 'Outlook on the web' (OWA)
Select the Calendar you want to share
For Select permissions

How To Request A Shared Calendar In Office For Mac