materials.dat and masklayersitefile.xml

hello

currently looking to have a  the materials.dat  and masklayersitefile.xml   defined in a path for all users company wide

reference

https://community.cadence.com/cadence_blogs_8/b/pcb/posts/why-move-up-to-allegro-17-2-2016-so-how-does-your-design-stack-up-reason-5-of-10

looks like the set materialpath  

is specific to masklayersitefile.xml 

and does not apply for materials.dat  file

it looks like, the masklayersitefile  does not replace the materials.dat file , but works in conjunction

what is the proper way to point those to a central location ?