Users locked out of their accounts for no reason.

dbhatoa
dbhatoa used Ask the Experts™
on
Hi,

Today we have had numerous users failed to login. As they login it reports their accounts are locked. We just unlock their accounts but what could be the cause? Event viewer gives no clue other than the usual client credentials failed.

This doesnt happen to all users, but a large enough quantity to think its not just people entering their details wrong several times.

Any help appreciated.
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Brian PiercePhotographer
Awarded 2007
Top Expert 2008

Commented:
Have they changed passwords recently
Are they attempting to access shares with stored credentials
Are they running services or tasks under their user accounts
Ned RamsayNetwork Operations Manager

Commented:
This can happen if a password policy has been changed.
Each password has a "set date" assigned to it so if a password policy previously asked for a 6monthly change and now asked for a 3 monthly one it can lock people out immediately.
Another alternative is when you are using Outlook Web Access for emails in that the users dont get the "your password will expire in X-amount of days" and suddenly they cant login.

Author

Commented:
Right, further update. It appears that when users try to access the internet through the proxy their ad accounts lock.
Ned RamsayNetwork Operations Manager

Commented:
What kind of proxy server are you running?
Ned RamsayNetwork Operations Manager

Commented:

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