Windows Executable on Linux Samba Server

Question

this is my first help request but i follow the site since a lot...I wrote an application in c# to interact with MariaDB, i set up a slackware SQL server and because the server joined an Active Directory domain i've installed also samba. Everything works, i can access sql tables throught my application and copy files with samba shares. Now the problem, i want to install the application exe on this linux server and execute it from windows machines, so i can keep it up to date from just one place. This works, but because the application must access to a network samba share and load some pdf files from it, this doesn't work! I mean if i execute the application from the linux server, (that has in the same directory the shared pdf dir), the program doesn't "see" the shared pdf directory.

I tried to change the path with IP address, mounting to a local drive letter, etc but it doesn't work. The application "see" the samba share only if i have the exe on the local computer, i could use it this way but i will have to distribute it on many pcs, Does anyone know if it's possible to fix this? Thanks for you patience and support! Bye!

PS.: I noticed that if i copy the path to a windows explorer window it asks me for username and password, could be this the problem, authentication?