Acctinfo.dll is a DLL included in the Windows 2003 Resource Kit. What it does is add a new property page, called Additional Account Info, to the user properties page in Active Directory Users & Computers. The page includes information is not typically available in Active Directory Users and Computers like the date when the user's password was last set, the user's password will expiry date, as well dates and times when a user last logged on and off.

If you have the 2003 Resource Kit Tools installed you need to run the following from a command prompt: regsvr32 %systemroot%\system32\acctinfo.dll This will activate the Additional Account Info property page in AD U&C. If you don't have the resource kit tools installed you can download them free and install them or just extract them and copy acctinfo.dll to %systemroot%\system32 and run the command shown above. You should now see the Additional Account Info property page as well.

Most of the information is pretty straight forward, pressing the Domain PW Info button will display the password policy applied to the domain. The User Account Control shows the userAccountControl attribute in Active Directory. This attribute holds determines if the password can expire, or if a smart-card is required among other things. Press Decode to see the values set. You can alos view the password policy applied to this account by pressing the Domain PW Info button.

If we press the Set PW On Site DC button we can see the users Distinguished Name and change the password for the user on a specific DC. This can be handy if you need to change a password and the PDC Emulator is down. Press the Just Find Site button to populate the DC and Site DNs.

You can also unlock and account or specify that the user should change the password at the next logon. Acctinfo.dll needs to be installed on the computer that you are accessing AD U&C from. If you manage your AD domain from multiple computers this will need to be installed on each computer. Acctinfo.dll is removable if you do not wish to use it, or want it removed from a specific system, from a command prompt run: regsvr32 /u %systemroot%\system32\acctinfo.dll

For more information see:

Download Details: Windows 2003 Resource Kit Tools