Hi @BlazTU ,
I tested in my Exchange 2019 environment and can successfully recover deleted items in the public folder by clicking the "Recover Deleted Items" button on the ribbon:
In your situation, do you mean the users cannot see the "Recover Deleted Items" button?
Is it occurring to the specific user or can be reproduced on any user?
Besides, if it's a non-mail public folder, according to the article below, this is a by design behavior that the "Recover Deleted Items" button is removed from both the ribbon and the shortcut menu. Please have a check at your end and if necessary, manually add the Recover Deleted Items action by customizing either the Quick Access Toolbar or the ribbon:
You can't recover deleted items from a non-mail public folder in Outlook 2016
Any findings, feel free to post back.
Update:
To recover items in tasks folder, please follow the steps below to manually add the "Recover Deleted Items" action:
- Select the task folder, choose the Folder tab on the ribbon, right click on the blank space, choose "Customize the Ribbon":
- Add a new group under the Folder tab and rename it to let's say "Recover items".
- In the "Choose commands from list", select "All Commands", select "Recover Deleted Items" > Add.
- Then you would be able to recover the deleted tasks by clicking the Recover Deleted Items button:
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