I have exchange server running on the head office and 4 braches connecting to exchange server . issue is some of benches running workgroup except one with the different domain . what is the best way to connect to exchange server 2010 from the client side . coz clients are not the AD users . I hope I can go with the outlook any ware ? which one is best POP3 , webmail or IMAP ?
All the branches connected via data IP VPN to head office