SuperSite for Windows posted a quick tip on how to force the SP1 Update on Office 365

If you're using Office 365 Home Premium or any business version of Office 365, you may have been surprised to discover that the recently-released Office 2013 Service Pack 1 (SP1) released wasn't offered to you immediately. Turns out you can force the update easily enough, if you know the trick.

Put another way, most of what constitutes the standalone version of Office 2013 Service Pack 1—which I wrote about the other day in Microsoft Starts Rolling Out Office 2013 SP1—has already been delivered to Office 365 customers over time. That's the point of these subscription services: You're kept up to date. So it's likely you already have "most" of the service pack, if that makes sense.

  Office 2013 Tip: Force the SP1 Update on Office 365