While Exchange 2016 is still “New”, there are some warnings or errors you may encounter but they are not actually a problem on the server. Let’s look at the example below:
![Exchange 2016 - eventid 642 (ese) Exchange 2016 - eventid 642 (ese)](https://www.collaborationpro.com/wp-content/uploads/2017/06/evenitID-642.png)
You might think the above warning is telling you something is wrong with the database, actually it’s more informational. While it will log this event a lot on your server, you can safely ignore it. Hopefully once the new features for the ESE are released these warnings will go away.
Hope it helps.