As a multi-year user of Config Tool, I did not know this help file (i.e. the Config Tool manual) existed. (There are some obsolete versions of the manual on the Internet, including at dahuawiki). It's not very obvious how to get to it, needing to first pull down the "about" down arrow. Dahua is inconsistent with this. In SmartPss you have to pull down the User Name icon to get to the manual. Anyhow, with this ranting finished, the password instruction is on page 15 of the manual:Maybe try reading the help file included with IPConfig tool.
"After setting the new password is completed, reset the password in Search setting interface."
But in the manual this instruction is out-of-order, appearing before the setting of the camera's password. It should appear after "Step 9: Click Finish to finish initialization." And in the "Modifying IP" section, there's not a peep about resetting Config Tool's password.
So the presence of the manual is a bit secret, the online versions are obsolete, the password instruction is out of sequence, and the video on dahuawiki incorrectly says to modify the computer's IP configuration. What chance does a new user have to make it work?
Added on edit: Andy posted a pdf and videos to change a new camera's IP address with Config Tool a few years ago here: Dahua ConfigTool using Instruction , AND looney2ns posted a copy of the manual later in the thread. (plus see post #9 for an additional video). The manual looney posted is a little older than the one I just found, but not obsolete. What I do is the same as Andy's instruction, except I don't set an email recovery address, and turn off easy4ip and auto-updates, all personal preferences.