At IU, why is my ADS domain account locked?
If your Indiana University ADS domain account has been locked, you will receive the following error message when you attempt to log in:
"Unable to log you on because your account has been locked out, please contact your administrator."
An ADS domain account can be automatically locked for several reasons:
- If you have incorrectly entered your password 25 times within 2
hours while trying to log into the ADS domain, your account will be locked.
Note: Attempting to use your most recent previous passphrase will not cause your ADS account to become locked. This applies only to your one most recent previous passphrase, not all previous passphrases.
- If you have changed your ADS domain account password while you
were logged into another computer with the same ADS domain account,
your account can be locked. In this case, the first computer you were
logged into will attempt to renew its authentication using
invalid credentials held in a cache. While performing this operation,
the account becomes locked.
- Your account can be locked if you have changed your ADS domain
account password while a Microsoft Outlook session using
the same ADS account credentials is active. This happens because the
Outlook client periodically attempts to renew its connection to the
IU Exchange server using invalid credentials held in a cache. To prevent
the account lockouts from occurring, close the Outlook session that
was opened prior to changing the password.
- Similarly, if you change your ADS domain account password while
logged into a phone that works as a client for UniCom (such
as the LG-Nortel IP Phone 8540), the phone will keep attempting to
log in using the old credentials, and may become locked. It's best to
log out of the phone as well as other applications before changing
- If your computer is not configured to use the NTLMv2 authentication protocol, your account can be locked.
If you need to use your ADS domain account immediately, contact your campus Support Center. If you do nothing, your account will remain locked for a set period of time.
For more on locked accounts, see articles 300436 and 271496 at the Microsoft Help and Support web site.
Last modified on February 19, 2013.