Hi all! AFAIK, DSAccess use LDAP ports for communicte with AD by Exchange server. Port are 389, 636, 3268 and 3269. For Exchange Server 2003 is well documented at http://technet.microsoft.com/en-us/library/bb124641(v=exchg.65).aspx I understand that Exchange Server 2010 use the sames ports. Is it documented in any place? Thanks!

Hi, Yes see the below Technet Article. Exchange Network Port Reference http://technet.microsoft.com/en-us/library/bb331973.aspxMartina Miskovic