Guide to adding shared mailboxes in Outlook app: Android
Make sure you have already completed the instructions to set up outlook on your Android after the email transition first.
Step 1: Open the sidebar (select the icon to the left of the word Inbox in upper left section).
Step 2: Select the gear icon.
Step 3: Select Accounts.
Step 4: Select Add Account.
Step 5: Select Add a shared mailbox.
Step 6: Enter the name of the mailbox you wish to open and select Continue.
Step 7: Select the back arrow twice in the upper left corner.
Step 8: Select the home icon again to see your new account listed on the left side. Select the account to access your shared mailbox contents.