Generating a PDF via Word (Save As --> PDF) with various links. Mailto (opening in mail default software) + internal document link work as intended.
Links to internal network ressources do not open (pdf conversion from net share path to UNC path works): I have a security warning concerning trusting the site, where the document is located (intranet net share). I am aware of the security settings in the adobe trust manager - can set up whatever I want, it's not changing anything.
Can open the generated UNC paths in a browser without any problem.