I have a PC on which the last time I installed Final Fantasy XI, I only installed Final Fantasy XI. The installation process had separate installations for each of the expansions, and I quite simply didn't do them. I was using what SE called the "Starter" disc which they sold back in 2006 or 2007 in response to Microsoft releasing Windows Vista. All discs of Final Fantasy XI sold prior to that could not properly install the Playonline Viewer on Windows Vista (and probably all subsequent releases of Windows).
The game did install just fine, and I am able to logon without problems (as long as my character has been left in a non-expansion area when I last logged off). It was expected that even though my account is fully registered for all the expansions and add-ons, I would not be able to enter any expansion area when using that particular copy of FFXI. (I normally play on another PC which has all expansions installed, and I am able to get to any location in any expansion of the game)
In the update notes for the May 2015 update, it was stated that expansion data for Rise of the Zilart and Chains of Promathia would be downloaded to all clients that didn't already have them.
When I ran FFXI on that client described above prior to the May update, all the expansion and add-on logos on the right side of the title page are darkened. This is expected. However, after the May update, the Chains of Promathia logo has been lit up, but not Rise of the Zilart (and all others were still dark too).
In the update notes for the August 2015 update, it was stated that the expansion data for Treasures of Aht Urghan and Wings of the Goddess would be downloaded to all clients that didn't already have them.
And indeed, after that update, the logos on the title page for Treasures of Aht Urghan and Wings of the Goddess do come up highlighted. But Rise of the Zillart, and all add-ons (and Seekers of Adoulin of course) still remain dark.
Further, I tried to get through the gate in Zehren Mines to the path that leads to Korroloka Tunnel, and in speaking to the NPC at the gate, the ability to go through the gate is not offered.
Remember that all of this is occurring only on the client on which I never installed any expansions at all. All the rest of the clients I have installed have no problem with this as they all have all expansions installed (except no Seekers of Adoulin on the PS2 clients).
I know that in North America, no copy of FFXI that was able to install the base data of the game was ever sold without the ability to install at least Rise of the Zilart. In fact, on the console systems, there is no separate installation for the expansions.. the process installs the base and all expansions on the disc in a single installation run.
The solution most certainly could be to just install the Rise of the Zilart expansion on that client now. But I don't really need it on that client.
I am providing this note as a FYI to SE that even though they said Rise of the Zilart data would be downloaded to all clients that didn't already have it, it would appear that is not actually true. It's probably not real important to fix it, but I thought I should at least let SE know of my observations.