By design, Microsoft's Office Insider program pushes out pre-release builds to Office 365 subscribers. These new builds come very frequently, sometimes more than one in a week. Although we are a Microsoft Partner, we get no advance notice of these updates, and we have no way to test them with our software before they are rolled out to users. (Each rollout seems to happen over a span of days or weeks, so even if you're in the program you may not yet have the latest build.) Unfortunately, on multiple occasions an Office Insider update has caused Palisade software to fail in some way that is extremely time-consuming to diagnose.