Exchange 2013 CU12 came out in May 2016 and is the most recent release of Exchange 2013. Note: Cumulative Update 10 or higher is required to co-exist with Exchange 2016. Upgrading to CU12 may require an AD schema upgrade depending on your current version of Exchange 2013.
- For convenience, here is the link to download CU12.
- Instructions to Upgrade an existing Exchange 2013 deployment to CU12.
- Remember on new deployments, you can deploy Exchange 2013 from the CU12 Rollup itself, saving time (walkthrough links above).
Important points to know when upgrading to Exchange 2010 CU10:
- If you set an HTTP redirect in Exchange 2013, you may need to re-do all those settings.