Redeposit miles for return leg of RT award ticket- possible?
 

Hi,

I have an upcoming CDG-BOS ticket using 90k miles.

I found a nonstop return on AF on my preferred travel date.

Does anyone know definitively if, once I arrive into Boston, I can cancel the return portion and redeposit the 45,000 miles?

An agent told me that as my ticket was a round trip it had to be done after departure. Does that sound right to you?

Thank you!