Outlook connecting to front-end exchange server

[Alan]

Hi,

I have this weird issue going on for my outlook client. I have outlook 2000,
XP and 2003 users. My current environment havin a exchange 2003 cluster
back-end server and 2 front-end server running NLB in the DMZ.
Now when the users try to launch their outlook, intermittenly they will be
prompted to login again. I have noticed this login requirement came from the
front-end server.
I have enabled diagonistic loggin on all my exchange severs for IS public
folder logon. I have found users logon via my front-end public folder store
as well as my back-end. Now why users will logon to the public store in the
front-end server instead of the back-end?

Can anyone enlighten me?
Thanks.
Alan

 

[Abhi]

Is there any public folder on your FEs?

 

[Alan]

no public folders for both front-end and back-end