Microsoft 365 users across multiple regions experienced connectivity errors Thursday as the tech giant worked to resolve a widespread hours-long outage caused by elevated system loads. The “elevated load” wasn’t driven by an increase in traffic, according to an alert from the Microsoft Admin Center. Instead, it was the result of a “number of servers being unexpectedly unavailable, straining the remaining infrastructure.””We’re working to safely return them to service,” Microsoft said, adding it was “aggressively…