I just downloaded the kopano deskapp 1.5.2 , istalled it on Windows 10 and tired to print an email (it was my father who needed it :-) ) .
But it was not possible. It opens a new window-box, but with no button or link. On Google I found several threads here with described the same problem from last year.
Is it possible that this is still not solved???
Printing in deskapp 1.5.2 not pssible
I’ve tested printing with 1.5.2 on various clients - all work, have you tried to clear the deskapp cache ?