Create the public folder mailbox

1. In the left panel of Exchange Admin Center, select public folders.
2. At the top of the page, select public folder mailboxes.
3. Select the plus icon.
4. Give the public folder mailbox a name, select an organizational unit, and select the mailbox database. Select save.

Create the public folder.

1. At the top of the page, select public folders.
2. Select the plus icon.
3. Give the public folder a name. For example, if you want to have public email address sales@example.com, you would enter sales in name. Select save.
4. On the right-side of the page, select Enable.