Because of government regulations, our Tokyo office, has to power down for an entire weekend all servers in the data center. We do not have a stretched DAG or site resilence setup for this office.  And it does not look like it will get approve.   I am looking for a good technote or something on how to power down not only the DAG memebers but the FSW.

I need some guidance.

many thanks

It doesn't really matter since you are powering everything off, but if you want you put all the servers in maintenance mode.

http://blogs.technet.com/b/nawar/archive/2014/03/30/exchange-2013-maintenance-mode.aspx

You will have to disable maintenance mode once they're powered back on, so I probably would avoid that extra work.