My daughter is currently in the Marines stationed in Japan, currently she has evidence that husband is having an affair. She was married in Los Vegas NV, station in San Diego CA but recently deployed to Japan. She is a resident of Orlando Florida, she want to give me power of attorney while she is in Japan and want me to file here in Florida is that possible, she wants this over ASAP and don't want to wait to return to CA.

She could contact JAG for advice.

Yes, I'm not sure one can confer a POA to act in a divorce action. But I would recommend talking with a local JAG attorney as her first step. Most states in the US have no fault divorces, so proof of infidelity shouldn't be necessary.