As Public Folders are stored in Public Folder Mailboxes.Deleting Items from Public Folders are stored in the Dumspter.
Public Folder Dumpster remains for 14 days by Default. and then its get deleted
To Check the Settings –
Get-Mailbox –PublicFolder | FT Name,RetainDeletedItemsFor -AutoSize
The Best way to Access the dumpster is using Outlook.
Lets say am going to Delete an Item from Public Folders
Choose the PF Folder –
Folder – Recover Deleted Items
Choose the Item To recover
Restore Process will be added in the future.