special characters not allowed in attachment

special characters not allowed in attachment

We are on build 11111 for ME Service Desk Plus. After the recent upgrade to this newer version, it seems like users are unable to attach certain files if have certain "special characters". Users receive the following error:

Invalid characters present in the filename.  We recommend to use only alphabets, numbers, dots, hyphen and underscores.

Is there a setting that can be changed to allow these other special characters? 

                  New to ADSelfService Plus?