How to add abbyssea ultimate edition to existing account?

What the title says. How do I add my single CD key to my exisiting PoL account with all previous expansions?

If you have all the way through to WotG installed already, just need to go to the Content ID section and add the key from Ultimate Edition to each of the add-ons (ACP, MKD, ASA, Abyssea Vision, Scars, Hero). The DAT files are downloaded automatically with the updates, just need to the content ID key to activate them.

If you don't already have ZM, CoP, TAU, and WotG installed, you will need to install from the CD/download. IDK if there is a way to install the individual expansions, or if you'll have to do the full install though. I had them core expansions already and just bought it for the key to activate the add-on's I hadn't gotten yet.

I'm having the same problem, purchased the Ultimate Edition and it installed everything up to Abyssea just fine, but trying to register Abyssea with the existing serial ident. key gives an "invalid code" error. Something I'm doing wrong?

I'm having some problems after they transferred all the services to the Square Enix Management account, can't find a way to register my expansion codes. I tried via POL but it refers me to the website and I clicked every single link and nothing gives me the option to add anything but purchase it. Why do they have to make it so difficult?

My husband is minutes away from cancelling his account for the very same reason. He eventually found out how to do it though, but he's been through so many options he's forgotten what he did.

This system is the worst I've ever seen and the payment options are horrendous if you don't live in Japan! Buy crysta which will do you in if you don't buy enough or use it within a set period, or use some untrustworthy source to have access to your credit card details which defeats the security of having direct debit. Why did SE choose to do this? And what's more if you purchase your copy through Steam and try to copy and paste your registration code it doesn't paste the whole lot because the site uses 4 separate boxes. The website is a mess.