How to create a shared mailbox with Office 365

Setting up an Office 365 shared mailbox is fairly simple. Follow these steps to create your shared mailbox.

• Log into your Office 365 admin center or Exchange admin center. (You must be an admin to create a shared mailbox on Office 365 or Exchange online.)

• In the admin center, go to Office 365 Groups > Shared mailboxes.

• On the Shared mailboxes page, select +Add a mailbox and then enter your mailbox name. (Note that the wizard will automatically choose an email address for you, so you'll need to edit it.)

• Select Add and then, under Next steps, click Add members.

• After selecting the +Add members button, check the people you want to invite to the mailbox and then select Save. (Note that you can't invite people who aren't part of your organization.)

• Select Close to finish the setup. But you're not quite done! You need to block sign-in for the shared mailbox account to keep the mailbox safe from hackers. Your invited users will log in via their individual logins. 

• If you aren't using the new admin center, log into the new admin center by toggling it on at the top of the Home page. 

• In the admin center, go to Users > Active users and locate the account for the shared mailbox. 

• Select the shared mailbox user, which will pull up a Properties window. 

• Select Block this user, which will pull up another window where you'll select Block the user from signing in. 

• Finally, select Save changes.