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
LVL 1
NetexpertsAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Justin OwensITIL Problem ManagerCommented:
Have you done any QoS sniffing between your offices?  How does the remote office connect to the UK home?
0
Will SzymkowskiSenior Solution ArchitectCommented:
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
0
B HCommented:
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"
0
Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

NetexpertsAuthor Commented:
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
0
NetexpertsAuthor Commented:
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
0
NetexpertsAuthor Commented:
Addition:
I've installed SMTP onto the server (clutching at straws) and i can now connect through TELNET successfully and log onto the maibox. However whatever config i try on Outlook it still fails.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.