We have an exchange 2007 server and are migrating to Office 365 this weekend. I plan to make the MX record change Friday evening. As the MX record information change propagates I would like to have all incoming email messages auto responded to so that the sender can be informed that their message will not be read until the following week ( i will write up an appropriate message). I need help with how to setup that kind of auto response for everyone. Thanks in advance experts.