Exchange Server 2013 Enters Extended Support Lifecycle Phase

Published Apr 10 2018 07:25 PM 29.2K Views

Exchange Server 2013 enters the Extended Support phase of product lifecycle on April 10th, 2018.

During Extended Support, products receive only updates defined as by the Fixed Life Cycle. For Exchange Server 2016, Fixed Life Cycle will include any required product updates due to security and time zone definition changes.

With the transition of Exchange Server 2013 to Extended Support, the quarterly release schedule of cumulative updates will end. The last planned cumulative update for Exchange Server 2013, Cumulative Update 21, will be released in June 2018. Microsoft may at its discretion release a future cumulative update to aggregate previously released critical updates or to address unforeseen future O365 Hybrid connectivity requirements. At this time there is no explicit plan to exercise releasing future cumulative updates. Microsoft encourages Exchange Server 2013 customers to adopt Cumulative Update 21 as soon as possible to ensure uninterrupted delivery of any future security related fixes. This includes customers who may still be running Exchange Server 2013 Service Pack 1. After September 19th 2018, only Cumulative Update 21 or its successors will receive critical updates. During the Extended Support phase, only the latest cumulative update is eligible to receive critical updates once the standard 3 month transition period of the prior cumulative update has lapsed. Critical updates will continue to be made available via Windows Update and the Microsoft Download Center. Additional lifecycle information for all Microsoft products is available on

Exchange Team

Not applicable

I know that this could not be the right post for me. But I'm trying to download the Exchange Server Role Requirements Calculator v.9.1 from the link but it's not available. Return a message "the item its not yet published". Can someone help please? Best Regards

Not applicable
Hi Diego,

Thanks for the heads up. We're aware of an issue that blocked the Exchange Server Role Requirements Calculator download. It's fixed now. Sorry for the inconvenience.

Occasional Visitor

Exchange 2013 - Installing on Windows 2012.  After installation, we are not able to install ANY of the CUs.  Tried 1, 6-9, 23.  I understand that the CU also is cross related to the .NET version.  We have tried all of that. Should we be able to install CU23 without having any of the other CUs installed?  Any assistance would be appreciated.

Version history
Last update:
‎Feb 10 2021 08:02 AM
Updated by: