Just an update on this guys, we had three other customers login this morning and it seems that their accounts are also listed as: "Sync not running" but some of their messages have been synced. Emails are below:
drew@formation8.com (which is somehow listed twice)
sam.kwok@garage.com
oprokhorenko@splunk.com
-Andrew

> From: Jeff Meister <jeff@esper.com>
> Date: Mon, Jun 22, 2015 at 4:00 PM
> Subject: Nylas bug reports
> To: support <support@nylas.com>
> Cc: Michael Grinich <mg@nilas.com>, Christine Spang <spang@nylas.com>, Kavya Joshi <kavya@nylas.com>, Karim Hamidou <karim@nylas.com>
> Hi Nylas folks,
> I made a new thread because the old one was getting really long. We've noticed a few things when onboarding our first few Exchange customers:
> 1. One of our users signed in to Nylas successfully with email oprokhorenko@splunk.com, but I see in the dashboard that his status is "Sync not running", with a white circle rather than red or green. We haven't seen this one before. Clicking on his entry does show 84 messages synced, but that hasn't changed in a while. What should we do?
> 2. We may be experiencing event duplication issues again, but I'm still looking into this to see if we're causing the problem from our side. The affected account in this case is han@formation8.com. I'll send an update once I have something concrete, but I wanted to bring it up in case there are any quick checks you can run on his account in the meantime.
> 3. I noticed that drafts have started appearing in my delta sync. Maybe it was always this way and I didn't notice because my testing accounts didn't have a user actively emailing, but we're getting a lot of data that we don't need. We use exclude_types in our delta sync requests, with every type except "event", but if I add "draft" to this list, I get a bad request error from Nylas. Can you enable filtering of drafts here?
> Thanks again, and see you on Wednesday!
> Jeff