- 2 Windows 2000 AD sites separated by WAN infrastructure - 2 Domain Controllers at Site A, 1 DC at Site B (Global catalogue) - Exchange 2000 SP4 running at Site A (on one of the domain controllers which is also the FSMO). No Exchange server at Site B. - All AD logons at either site A or B work fine. All network access works fine from either site. - Exchange access at Site A works fine. - Client access (Outlook 2000) to Exchange server (in Site A) from Site B presents with two "Exchange server is unavailable..." messages followed with prompt to re-key in username, password and domain. I key in the correct credentials but still denied (Invalid logon credentials...) - My account works fine (my account is administrative, the others are not). In either case access is slow and we all get the timeout messages. I have not changed my password in some time, whereas other accounts have. Could it be replication related? Permission Related? Any help with this would be greatly appreciated. Regards, Mino.