Outlook 2010 OAB password prompts, client is sending email alias instead of logon (i know the error, just not how to fix it)

Hi all,

I have a user that keeps getting pass prompts on outlook 2010 when downloading the OAB, now ive run a wireshark and can see they are connecting to the web based OAB, then i checked exchange and i can see the alias is being sent as the logon name

e.g
users logon user@domain.co.uk
primary address user@domain.com

exchange audit failure, logon attempt from user@domain.com not .co.uk. .com is not part of our domain logon its a alias on excahnge only

this is onyl happening for this user everyone else is fine including myself and were both setup the same way

where do i look or go to to make sure user@domain.co.uk is sent for authentication instead of the alias .com?

Thanks
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awilderbeastAsked:
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CSIPComputingConnect With a Mentor Commented:
IT's possible that there's a set of stored credentials wihich are incorrect for that server on this user's machine.

Check Credential Manager and get rid of any incorrect stored credentials.
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awilderbeastAuthor Commented:
This was it!
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