Shared Mailboxes do not show in Outlook on the web

hi bryanba,

firstly, may i know if you didn’t use shared mailbox before and after creating shared mailbox, you want to set the created shared mailbox display in owa(outlook web app)? if so, please check if you have the full access permission of the shared mailbox as the following steps at first:

a. go to shared mailboxes.
b. select the shared mailbox you want to edit, double click it.
c. select mailbox delegation, check if you have the full access permission of the shared mailbox. if no, add your account in the full access list.

if you have the full access permission of the shared mailbox, generally, we have two ways to open a shared mailbox using outlook web app. you may want to try both methods and see which works best for you.

1. add the shared mailbox so it displays under your primary mailbox in outlook web app.

this method is recommended if you want to monitor the email from your primary mailbox and the shared mailbox at the same time. in addition, after you complete this task, the shared mailbox and its folders are displayed in the left navigation pane each time you open outlook web app.

a. sign in to your account in outlook web app.
b. right-click your primary mailbox in the left navigation pane, and then choose add shared folder.
c. in the add shared folder dialog box, type the name or email address of the shared mailbox, and then click add.

the shared mailbox displays in your folder list in outlook web app. you can expand or collapse the shared mailbox folders as you can with your primary mailbox. you also can remove the shared mailbox from your folder list. to remove it, right-click the shared mailbox, and then click delete.

2. open the shared mailbox in a separate browser window.

we recommend that you use this method if you want to view and manage the email for the shared mailbox in its own browser window.

a. sign in to your account in outlook web app.
b. on the outlook web app nav bar, click on your name. a list appears.
c. click open another mailbox.

d. type the email address of the other mailbox that you want to open. another outlook web app session opens in a separate window, allowing access to the other mailbox.

note: if you mistype the email address of the mailbox, a second window opens alerting you that the webpage can’t be found. try retyping the email address.

for your reference: open and use a shared mailbox in outlook web app.

if you cannot open shared mailboxes in owa with the information above, we need to collect the following information for further assistance:

1. if you encounter any error messages when performing the steps above, please capture corresponding screenshots and share with us for analysis. to upload the screenshots, you can click use rich formatting when replying and then click the insert image button.

2. please provide the detailed steps of how you created the shared mailbox.

best regards,
aaron