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Pop3 Outlook to Exchange 2007 keeps prompting for username and password on certain clients

Hi Guys,
We have a uk based Exchange 2007 server that is connected to by Outlook clients globally using Pop3 (Their choice of connection, not mine) and although the majority are fine we have a few users in another country that it keeps asking for the username and password every five minutes. I have setup a laptop with one of the users accounts in the UK and this works fine so i would say it's a location specific issue however they say that their Internet connection is stable unless they're connecting to anything on the UK server. Also it appears that OWA seems to work fine.
Any ideas on what to check on this ?

Thanks

Justin Owens

Have you done any QoS sniffing between your offices? How does the remote office connect to the UK home?

Will Szymkowski

Have you tried to get the user to use the "Stored Usernames and Passwords"?
- Open control panel
- Click User Accounts
- Click Advance Tab, Click Manage Passwords Button
- Click add button and put in the users credentials

Bryon H

i doubt this is a location problem unless they have some high-end router that filters pop3 traffic (unlikely)

more likely than not, their using the wrong format of the username... please confirm if they are using the format of "domain\username"

Netexperts

ASKER

Thanks, i've changed the credential manager bits and this made no difference and also added domain\username but also didn't resolve it.
The error message says 'Task user@domain.com - receiving reported error (0x80042108) Outlook cannot connect to your incoming POP3 e-mail server

Netexperts

ASKER

I've also tried to Telnet through 110 and this connects fine however if i try and enter User "username" it then returns -ERR command is not valid in this state.
Not sure if this helps

ASKER CERTIFIED SOLUTION

Netexperts

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