Add another person’s mailbox to your folder list in Outlook Web App After you complete this procedure, the person’s mailbox for which you have been provided access to will display in your Outlook folder list every time you open Outlook. Log in to your mailbox using Outlook via https://outlook.office365.com.  Right-click the word Folders on the left-hand side and select Add shared folder or mailbox. In the Add shared folder dialog box, type the name of the mailbox that you have been provided access, and click Add. The mailbox appears in your Outlook folder list. If you have only been provided access to specific folders in the other user’s mailbox, you will only see the folders for which you have been granted access. If you decide that you no longer want to see the other person’s mailbox every time you open Outlook, right-click the folder, and click Remove shared folder. Open another person’s mailbox in a separate browser window in Outlook Web App If you do not want to add the other person’s mailbox to your folder list in Outlook Web App, you can open the other person’s mailbox in a separate browser window. Log in to your mailbox using Outlook via https://outlook.office365.com.  In the Navigation bar on the top of the Outlook Web App screen, click on your name. A drop-down list will appear. Click Open another mailbox. Type the email address of the other mailbox that you want to open, and click Open. The other person’s mailbox opens in a separate Outlook Web App browser window. If you have only been provided access to specific folders in the other user’s mailbox, you will only see the folders for which you have been granted access.

As of 12/7/2023, Office 365 allows you to use two different versions of Outlook. The Old, and the New. The new version has an updated UI, they've moved around some things, and generally just did an update of how Outlook runs. In the Old Outlook, you could see your shared mailboxes right along with your personal email address, which was nifty and convenient. Regrettably, they took away this option in the New Outlook, you must now open Outlook, navigate to the "Shared with me" drop-down menu, and find your groups from there. (Note: as of right now there is no way to make the mailbox appear along with your own, UNLESS you statically set and add the account via it's credentials.)

Open Outlook. On the File tab, select Options. Select the Mail tab. Under Send Messages, select Empty Auto-Complete List. Select Yes.

Choose the Channel You Would Like to Sync Open Teams and select the appropriate Team. Click on the Channel that has the files you would like to sync. Click on the Files tab. Click on Sync to start syncing the files to your computer. If there is no sync button, you need to click the “…” button to access it. After clicking on "Sync" you may see OneDrive window briefly popup and then disappear. This is normal. If you aren't logged into OneDrive, this window will prompt you to log in. You can dismiss the “We’re syncing your files” popup. If there are only a limited number of folders you want to sync within the channel, click your OneDrive icon and select “Settings” Under Account, locate the Channel you selected to sync and click the “Choose folders” option Select the folders that you need synced de-select any of the items you do not need. It will display the rough file size of the folder so you know how large the download is.

Go to https://outlook.office365.com – if you are not automatically signed in, login using your credentials. In the top right corner, click on your profile icon – this will either be you profile photo or a circle with your initials. Click ‘Open another mailbox’. A pop-up will then appear. Enter the name or email address for the shared mailbox. The mailbox will open in a separate tab. Click on the settings cog icon on the top right toolbar. At the bottom of the settings pop-out menu, click ‘View all Outlook settings’. Make sure you are in the Email menu to the left of the pop-up window. Then click ‘Automatic replies’ on the secondary menu. Here you can switch on automatic replies, set time frames, and write internal and external automatic replies. When you are ready, hit save.