Tag Archives: Cumulative Update

Exchange 2013 Cumulative Update installation tips and best practices

Exchange 2013 logo

Edit: The latest update is now Exchange 2013 Cumulative Update 18. See here for a list of all updates and KB articles.

I’ve got a few Exchange 2013 installations in production now so I thought it was about time I wrote a post on best practices when installing Exchange 2013 Cumulative Updates and Service Packs.

Each Cumulative update is a version of Exchange in it own right. Therefore if you are installing a new deployment of Exchange you can install straight from latest Cumulative Update, which at the time of writing is CU11 (released December 2015). KB3099522 contains a list of fixes and enhancement for CU11. Check here to see what the current latest version is.

This also means that once installed you cannot uninstall a Cumulative Update, if you do you uninstall Exchange.

The update is approximately 1.6GB in size and can be downloaded from here.

In my test lab with a single Exchange server and single Domain Controller the update took an 60 minutes to install.

The official Exchange Team blog post can be found here.

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Exchange Server and Update Rollups Build Numbers

Exchange 2019

This post is a list of Microsoft Exchange versions, build numbers, Update Rollups and Cumulative Updates that I keep up to date.

The latest version is Exchange 2019 Cumulative Update 6 which was released on 16 June 2020.

Microsoft Technet has some really useful articles at the links below detailing all the Exchange Service Pack and Update Rollup build numbers since Exchange 2003.



Since this page was first created Microsoft has now combined the two source pages itself into one Exchange Server Updates: build numbers and release dates page which can be found at the link below.


The tables below are a snapshot of the link as of June 2020.

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