I have a deco M9 with 3 access points:

A1 = connect to internet router

A2 has a Synology nas connected

A3 = normal access point

I have a network drive mapped to the shared files on the nas. 

I get windows network errors (network name is in use) when I started the access on e.g. A3 and I walk with my pc to the A1 WiFi area. 

Does anybody know how to get this configured ( either on windows or on deco) so that I can move from area to area without getting this windows fault?