Another user or an administrator might provide you with access to another Outlook inbox.

To be able to access this inbox in your Outlook, you first need to verify which Outlook version you are using. There are two versions. Outlook and Legacy-Outlook, which can easily differentiated by their look. ​ ​Regular Outlook

Regular Outlook's top bar is colored. It doesn't have to use the blue color as shown in this screenshot. The accent color can be chosen by the user, so it might be any color.

Legacy Outlook doesn't have an accent color.

If you are using regular Outlook, you can follow these simple steps:

In the top left of your Mac's menu bar, click on File &gt; Open &gt; Shared Mailbox...

In the new window, enter the email address of the shared mailbox you want to access. Once found*, click on it in the list below the search field and click on Add.

* Outlook might display a No results found screen instead, this can happen if the mailbox was newly created. Outlook needs to update the address list, before you can add the mailbox. This process happens automatically, but might take up to 48 hours. This can't be speeded up. Please be patient and try again from time to time. If the mailbox doesn't show up after more than 48 hours, please reach out.

The shared mailbox will appear in Outlook's left sidebar. 

If you are not seeing the sidebar, click on the three lines in the top left to expand it.

That's it. You can now access the mailbox like any other. In case you have received "Send As" rights as well, you will be able to select which address a new email should be sent from in the new "From:" field.

1. Open Outlook on your Mac. ​

2. In the top left of your Mac's menu bar, click on File &gt; Open &gt; Shared Mailbox...
 
 
3. In the new window, enter the email address of the shared mailbox you want to access. Once found*, click on it in the list below the search field and click on Add.
 
 * Outlook might display a No results found screen instead, this can happen if the mailbox was newly created. Outlook needs to update the address list, before you can add the mailbox. This process happens automatically, but might take up to 48 hours. This can't be speeded up. Please be patient and try again from time to time. If the mailbox doesn't show up after more than 48 hours, please reach out.
 
 
4. The shared mailbox will appear in Outlook's left sidebar. 
 
 If you are not seeing the sidebar, click on the three lines in the top left to expand it.

5. That's it. You can now access the mailbox like any other. In case you have received "Send As" rights as well, you will be able to select which address a new email should be sent from in the new "From:" field.

In the top left of your Mac's menu bar, click on File &gt; Settings...

In the new window, click on Accounts.

Make sure that your own account is selected in the left sidebar, then click on Advanced... in the bottom right corner of the new window.

Inside the Delegates tab, click the + symbol in the bottom-left corner. Do not confuse this with the + symbol in the upper portion of the window.

* Outlook might display a No Results Found screen instead, this can happen if the mailbox was newly created. Outlook needs to update the address list, before you can add the mailbox. This process happens automatically, but might take up to 48 hours. This can't be speeded up. Please be patient and try again from time to time. If the mailbox doesn't show up after more than 48 hours, please reach out.

1. Open Outlook on your Mac.

2. In the top left of your Mac's menu bar, click on File &gt; Settings...
 
 
3. In the new window, click on Accounts.
 
 
4. Make sure that your own account is selected in the left sidebar, then click on Advanced... in the bottom right corner of the new window.
 
 ​
5. Now click on the Delegates tab.

6. Inside the Delegates tab, click the + symbol in the bottom-left corner. Do not confuse this with the + symbol in the upper portion of the window.

7. In the new window, enter the email address of the shared mailbox you want to access. Once found*, click on it in the list below the search field and click on Add.
 
 * Outlook might display a No Results Found screen instead, this can happen if the mailbox was newly created. Outlook needs to update the address list, before you can add the mailbox. This process happens automatically, but might take up to 48 hours. This can't be speeded up. Please be patient and try again from time to time. If the mailbox doesn't show up after more than 48 hours, please reach out.
 
 
8. The shared mailbox will appear in Outlook's left sidebar.