Office 365

It’s amazing to believe that Microsoft Ignite was over a month ago. With 1,610 sessions Microsoft gave us a massive amount of announcements and demonstrations of new product features. This included Exchange 2019.

If not already, I highly recommend checking out 15 Ignite sessions every Exchange admin should see.  Each session in this article includes extensive notes on what each session contained. In addition, those notes contain timers so you can jump to the section that interests you the most. Hopefully, it will also serve as a reference if you need to search for a certain announcement or feature weeks (or even months) down the road.

Here is what Ignite taught us about Exchange 2019.

Changes to Exchange development

The tagline for Exchange 2016 was that it was “forged in the cloud”. This was a result of Exchange Online and Exchange on-prem sharing a common code base. The greatest benefit of this common code was that it ran in the cloud for a number of months before shipping on-prem as a cumulative update. By the time the code was released on-prem, it had been more than validated as stable and able to run at scale.

Going forward Microsoft has separated Exchange on-prem into its own code branch. This means that Exchange online is no longer driving cumulative updates for on-prem. What will drive updates are security patches and feature requests from customers. So, be sure to make your voice heard on UserVoice, at conferences, and in the various TAP programs.

While Microsoft currently plans to keep cumulative updates quarterly, they have opened up the conversation on whether updates should occur less frequently. Common feedback is that the current release cadence of quarterly cumulative updates is too aggressive for some customers. The product group also believes this could result in more stable releases.

Last week was a big week for Exchange 2016. Microsoft released Cumulative Update 11. At this time no updates were released for Exchange 2013 or Exchange 2010. Exchange 2013 entered extended support back on April 10th, and Microsoft announced in June that cumulative update 21 was the last planned update for Exchange 2013.

As always, test these updates in a lab first! I recommend checking out this 7-part guide on configuring Exchange in your lab. It doesn’t take much to get one going.

The updates are as follows:

Exchange 2016 Cumulative Update 11 | KB4134118 | UM Language Pack

Exchange 2010 SP3 Rollup 24 | KB4458321 (released September)

Exchange 2010 SP3 Rollup 23 | KB4340733 (released August)

So, what’s new in these Cumulative Updates?

Cumulative Update 11 now officially supports .NET Framework 4.7.2. Framework 4.7.2 is only optional at this point and will not become mandatory until the June 2019 updates. Due to no quarterly update scheduled for December, it is expected that CU13 will be the first version to enforce 4.7.2 as a requirement.

Support for 4.7.2 has been officially added to Exchange 2013 CU21, which was released back in June. 4.7.2 will also be a requirement for Exchange 2019. However, 4.7.2 is preinstalled with Windows Server 2019, so it will not require a separate download. For a great resource on navigating which .NET update goes with which CU I recommend reading Upgrade Paths for CU’s & .NET by Michel de Rooij.

In the June updates, it was stated that all Exchange roles would require Visual C++ 2013. Microsoft has since clarified this statement to the following:

• Mailbox role will require both Visual C++ 2012 & Visual C++ 2013
• Edge & Management tools only require Visual C++ 2012

Cumulative Update 11 will now perform prerequisite checks to confirm the necessary versions of Visual C++ are installed.

These updates contain 22 security and bug fixes. Check KB 4134118 for a list of issues CU11 resolves.