Trouble logging in

[SE_Chris]

The issue you are describing here looks like a problem with your configuration of the PlayOnline Viewer after a fresh reinstallation. In order to log on, you are required to have at least four pieces of information. Thanks To Sarick for the detail.
PlayOnline ID:
PlayOnline Password:
Square Enix ID:
Square Enix Password:
If you are missing any of this information, please check the SQUARE ENIX Support Center for instructions on how to recover lost information/configure the PlayOnline viewer.
The SQUARE ENIX Support Center can be found at this link:
SQUARE ENIX Support Center

[Sarick]

The issue you are describing here looks like a problem with your configuration of the PlayOnline Viewer after a fresh reinstallation. In order to log on, you are required to have at least four pieces of information. Thanks To Sarick for the detail.

I know about this because it's an experience I've dealt with several times. All the ID's and passwords to remember and setup confused me several times when I setup multiple accounts.

To OP it's confusing but if the management account is wrong ID IE case sensitive etc it can error out. The reason why your old system would work on the other computer is because the POL viewer hides some of the credentials that are verified when you log on. Since you can't see them without looking deeper into the client you may be trying to log on with the same password for both the playonline account and SE management account. Lastly putting the management account in the wrong box breaks everything.