Briefly summarized, the only way to do secure mail is pgp, the only way to do secure chat is to avoid all the main chat networks. And microsoft actively designs their systems to be easier to access for the NSA (far beyond their legal obligation) so you may assume that any microsoft product is a direct line to the NSA.
https://www.grc.com/securitynow.htm
Briefly summarized, the only way to do secure mail is pgp, the only way to do secure chat is to avoid all the main chat networks. And microsoft actively designs their systems to be easier to access for the NSA (far beyond their legal obligation) so you may assume that any microsoft product is a direct line to the NSA.