The problem is trying to contact Expedia! Through their extranet you can send messages to SOME guests but not all. If they have an overseas phone number then invariably they don't allow you to send a message to them (booking.com at least have an email address!). How do you contact Expedia? I've trawled their extranet and found nowhere to be able to contact them!
They're getting as bad as Telstra for customer service! I wish I could contact Expedia.....:-(