Yes just did it on Sunday. I called OC to add a guest name for a reservation that started the previous day. She said it was too late. I mentioned that I had been able to do this previously. She put me on hold and said she would try. After a bit of a hold, she came back and said that she had called the resort and confirmed they still had the reservation intact. She then added the guest name, sent the email to the resort, put me on hold again, and called the resort again to make sure they received the update. Took her about 40 minutes, but she did get it accomplished.
Thanks. I was told once again that it is not possible anymore. Even if it was Wyndham who did not call me back in a timely manner to get it done as promised on the recording.