If anyone still care about Microsoft online services SLA, Microsoft just announced it SLA for Q3 2016
But did you ever ask yourself how Microsoft calculate the SLA for its online services
Microsoft is calculating the SLA based on the below formula
Where Downtime is Any period of time when users are unable to send or receive email with Outlook Web Access. There is no Scheduled Downtime for this service.
You Can refer to this document for more clarification about SLA for Microsoft Online services onlinesvcsconsolidatedslawwenglishnovember212016cr
References: Microsoft Products