Outlook 2000 problem with WinXP

Point value changed by question poster.

try creating a user account in xp that matches the user name in the outlook account. outlook checks for the user name logged on to the computer and compares it to the user name in outlook. if they are different it returns the error message you are getting.

eg. you are logged on as john on xp but your outlook account is johnny@mailbox.com
your xp user account needs to be johnny

Your userID created on Exchange Server must match
your userID on the domain controller.
You need to know the exact userID created on Exchange server and see if it is the same as your
domain account.
If it isn't then you must have the Exchange
ID match the domain ID.
e.g. jdoe - domain a/c
jdoe - exchange a/c (NOT johndoe)

Hope this helps.

I had a similar problem with XP, and Outlook 2000. I discovered that somehow the Registry got fouled up. Check for the following entries:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\ ClientProtocols]
"ncacn_np"="rpcrt4.dll" type REG_SZ
"ncacn_ip_tcp"="rpcrt4.dll"
"ncadg_ip_udp"="rp crt4.dll"
"ncacn_http"="rpcrt4.dll"

look at:

http://support.microsoft.com/default.aspx?scid=k b;en-us;321652

If they arent there, you will have to add the values.

I am using Outlook 2000, XP Pro, and Exchange 2000.