My company recently experienced an email outage that impacted a majority of our users. My exchange team is telling me they can't find a root cause, yet when I pulled the system logs I can see the Information Store service stop and restart itself 4 times over the same 10 minutes. They explained to me that the Information Store stopping and restarting would not have an impact on our users. However this seems contrary to the research I've done online.
So the question: What's impacted when the Information Store Service stops? Assuming no fail-over available.
Also, Once the service is re-started, how long does it take for email service to restore? The end user saw a 15-25 minute disruption in service.
Thanks for any help!