Note that SITI rules sometimes require that the traveler be physically present in the departure country to buy the tix, in which case dealing with a TA in that country from your desk in Dallas would be bending the rules. No one has said that applies to OWE fares, I'm just suggesting a bit of caution in your conversation with AA.

In other regions where there's no advanced purchase reqmt it's something of a don't-care, but with the NA 7-day reqmt it's less convenient should you really find yourself being required to do it.