Office365 OWA can not forward public folder emails

Hi all, 

in my company we have Office365 tenant and we all use Outlook for Web. Until few days ago we could forward emails from any mail enabled public folder and now nobody can do this any more, we all get error message "This message can't be sent right now. Please try again later". I tried with installed Outlook application on Windows 10 PC and there is working fine, no errors. So problem is just in Web Outlook.

I already tried few steps without result: 

- add full owner permissons to public folders 

- clearing browser cache and history

- incognito mode in few different browser  

- set users on "Send as" and "Send on Behalf" permissons

- sending on both internal or external email addresses

- with or without attachment

If anybody has some idea, I would be glad to try. 

Thnx