Which of the following connects Zscaler users to the nearest Microsoft 365 servers for a...

Zscaler's Microsoft 365 optimization model is designed to reduce latency and avoid breaking Microsoft-recommended connectivity patterns. The Office 365 One Click rule automatically applies recommended bypass/optimization behavior for Microsoft 365 traffic, including exemption from SSL inspection and other web-policy processing where required. Option C (Multiple distributed DNS resolvers providing local results) is correct because the immediate effect is optimized M365 handling rather than blanket inspection or blocking.

Why the other options are incorrect:

A. Single DNS resolver with forwarders providing centralized results: DNS resolves names to IP addresses; it is a support service, not an access protocol or scoring engine by itself.

B. Private MPLS in each branch office providing connection: Private MPLS backhaul keeps traffic on the old hub-and-spoke path instead of sending users directly to the nearest cloud service.

D. Optimized TCP Scaling for maximum throughput of files: TCP scaling can improve throughput for some flows, but it does not choose the nearest Microsoft 365 service endpoint.