At this time:

GRAD = nw65sp8 (with master Replic. t was the first server in a tree.. with iManager, iPrint, LDAPS(security), DA, https,... . As i`m understand all security objects was created when server was installed) . Users Login to this server, use volumes from this server, Printserver on this server, the Web server, ftp)
ERCOG - oes2 (with R/w Replic)
Gw - Oes2 (with R/W Replic)

The purpose - to migrate from NetWare to OES.
Restriction - the server equipment remains invariable (the server equipment that most).

Any suggestions please..