Where can you upgrade to AP's

So when we go in December the DW and I are planning to upgrade our tickets to AP’s as we are going again in Jan without the DK’s to run the 1/2 marathon!! Can we upgrade at our Hotel or does it have to be in the park or DTD (Disney Springs)? Thank you in advance.

Guest services at a park or DTD. At the parks GS has a window outside the tap stiles, to the right at MK, Epcot, and AK I believe, and to the left at HS.

Thank you