Steps to create public folders in Office 365

1. Login to Office 365. From sidebar, select 'Admin centers' -> 'Exchange' option from the popup menu.

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2. Select the 'public folder' from the list and select the 'public folder mailboxes' tab. Click the '+' icon and add a new mailbox if there are no existing mailboxes.

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3. Enter the Public folder mailbox name and Save.

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4. Next select the 'public folders' tab and click the last option with 3 dots '...' and click the 'Root permissions'.

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5. From the Window that opened, click the '+' icon and click the 'Browse' button to find users list. Select the user and click 'OK'.

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6. Select the user mailbox and click the 'OK' button.

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7. Choose the 'Owner' in permission level and click the 'Save' button. Continue the operation to save all the changes.

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8. Next, follow this 'Step by Step Guide to Migrate Public Folder to Office 365'