authenticating in outlook

i am havingn problems with eu's not being able to send/receive email. we are using outlook 2003 and the eus are set up with pop access. all settings are correct but when they poll for mail a dialog box comes up requesting un, pw, and domain.
i have pop set to require ssl for authentication on the server and 'use SPA' is ticked in the client outlook properties.
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-pHAsked:
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-pHAuthor Commented:
in addition a couple EU's are getting an error msg stating.. "unable to log onto server using distributed password authentication..."
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-pHAuthor Commented:
if anybody runs into it, i solved this by clearing the security log.
-pH
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EE_AutoDeleterCommented:
-pH,
Because you have presented a solution to your own problem which may be helpful to future searches, this question is now PAQed and your points have been refunded.

EE_AutoDeleter
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