Recently, We have moved the SP 2013 applications from old server to new server. As the applications are being used world wide, some time document file names are a bit in different languages looks like special characters are there Although SP library has those files. Users were able to edit those files directly from client applications(MS word/Excel etc.). Now post migration ,users are unable to edit those files in new server.
But if we try to rename the file , then everything is working fine. Now the problem is we have huge no of files which are being used by different country users. So to rename files is not a solution.
So, Could anyone please suggest what could be the cause and resolution to that.