During the installation of ADMT PES (Password Export Server), the installer reports the encryption key password is wrong, even though you're absolutely sure it's the correct password. Although KB2004090 states this is for 3.1, the problem also exists on 3.2.
The reason for this is that the MSI installer does not elevate the session. If you are not logged on with the Administrator-account, the elevation does not occur automatically and the error mentioned above will appear, without any mention of elevation requirements.
To work around the issue, you can follow the steps below. This will ensure the MSI installer runs in an elevated session and the installation will continue as normal. Alternatively, turn off UAC, or use the "Administrator"-account (the domain admin, as PES has to be installed on a writable DC) to log onto the server and perform the installation.
More information: https://support.microsoft.com/kb/2004090