Hi @Citleial ,
Welcome to our forum!
As i know, after your admin has added you as a member of a shared mailbox, close and then restart Outlook. The shared mailbox should automatically appear in your Folder pane in classic Outlook. Please contact your admin and check if you are given the permission.
If your admin only recently added you to a shared mailbox, it may take a few minutes before the shared mailbox appears. Wait a bit and then close and restart Outlook again.
Based on the above, if that didn't work, then manually add the shared mailbox to Outlook:
- Open classic Outlook.
- Select the File tab on the ribbon, then select Account Settings > Account Settings.
- Select the Email tab.
- Make sure the correct account is highlighted, then choose Change.
- Choose More Settings > Advanced > Add.
- Type the shared email address, such as info@contoso.com.
- Choose OK > OK.
- Choose Next > Finish > Close.
Hope to help you!
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