Dears: is we can connect Exchange server to remote domain controller for around 50 user . and what the connection speed wanted

I would not do that.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hello. Have you thought about having the exchange server @ the DC site and remote users use Outlook Anywhere? Another option is to have a local DC that replicates with a PDC over a WAN link and put Exchange locally. Miguel Fra | Falcon IT Services, Miami, FL www.falconitservices.com | www.falconits.com | Blog