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

Posted on 2010-08-18
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Last Modified: 2012-06-22
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
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Question by:Netexperts
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6 Comments
 
LVL 31

Expert Comment

by:Justin Owens
ID: 33465976
Have you done any QoS sniffing between your offices?  How does the remote office connect to the UK home?
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LVL 53

Expert Comment

by:Will Szymkowski
ID: 33466165
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
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LVL 24

Expert Comment

by:B H
ID: 33466260
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"
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LVL 1

Author Comment

by:Netexperts
ID: 33473274
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
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LVL 1

Author Comment

by:Netexperts
ID: 33473408
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
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LVL 1

Accepted Solution

by:
Netexperts earned 0 total points
ID: 33473522
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.
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