User can't change profile photo. No choose button. Exchange 2013.

Hello. I have a strange problem. I want to allow my users to change their photos in Exchange 2013/Lync. They have permission to do this in OWAmailboxpolicy. They have a change button under their photo in OWA. If they push it they are redirected to photo edit page but there is no Chose button to upload the photo. Only Save and Cancel.

I can change my profile photo, but i'm an administrator of Exchange. Users and me have the same OWAmailboxpolicy and in OWAvirtualdirectory changing photos is enabled.

PS C:\Windows\system32> Get-OwaMailboxPolicy Default |fl *photo*


DisplayPhotosEnabled : True
SetPhotoEnabled      : True
SetPhotoURL          :

PS C:\Windows\system32> Get-OwaVirtualDirectory |fl *photo*


DisplayPhotosEnabled : True
SetPhotoEnabled      : True
SetPhotoURL          :

Any ideas how to bring this button back for all?

ps I wanted to place a screenshot of the problem, the system don't let me :(