Exchange Server 2013 Cumulative Update 3 (CU3)

by Arman Obosyan 26. November 2013 01:24

Cumulative Update 3 for Exchange Server 2013 resolves issues that were found in Exchange Server 2013 CU1/CU2 since the software was released. This update rollup is highly recommended for all Exchange Server 2013 customers.

The CU3 package can be used to perform a new installation, or to upgrade an existing Exchange Server 2013 installation to CU3.
You do not need to install Cumulative Update 1 or CU2 for Exchange Server 2013 when you are installing CU2.

This Cumulative Update includes Schema and AD changes, so make sure you run PrepareSchema / PrepareAD. After updating, the schema version will be 15283. For list of schema versions see wiki

Cumulative Update 2 for Exchange Server 2013 contains the following major changes

  • Usability improvements when adding members to new and existing groups in the Exchange Administration Console
  • Online RMS available for use by non-cloud based Exchange deployments
  • Improved admin audit log experience
  • Windows 8.1 / Internet Explorer 11 no longer requires using OWA Light

Cumulative Update 3 for Microsoft Exchange Server 2013 contains the fix for the security issue that is described in Security Bulletin MS13-061 and resolves the issues that are described in the following Microsoft Knowledge Base (KB) articles:

  • 2865161 "Errors: Failed exporting item id: from source id" when you try to copy search results in an Exchange Server 2013 environment
  • 2866064 Can't load OWA Premium by using Internet Explorer 11 in an Exchange Server environment
  • 2871980 Child domains are not displayed for selection when you create a mailbox by using EAC in an Exchange Server 2013 environment
  • 2874216 Security issue that is described in Security Bulletin MS13-061 is resolved by an Exchange Server update
  • 2878160 "The Active Directory user wasn't found" error when you create or update an In-Place eDiscovery search in an Exchange Server 2013 environment
  • 2882608 Exchange Server 2013 does not share the inproxy.dll file
  • 2886115 Retention policies are not applied to Exchange Server 2013 mailboxes when user accounts are on different domains
  • 2888274 WebClientReadFormQueryString string and WebClientEditFormQueryString string return incorrect URLs in an Exchange Server 2013 environment
  • 2888315 Event 2112 or 2180 is logged when you try to back up a database in an Exchange Server 2013 environment
  • 2888612 Retention policy does not work after you run a cmdlet in an Exchange Server 2013 environment
  • 2889786 Sign-in format for Outlook Web App on mobile devices is not adjusted according to the Set-OwaVirtualDerictory cmdlet in an Exchange Server 2013 environment
  • 2890650 Items in the Drafts folder are not stamped with the retention policy tag in an Exchange Server 2010 or 2013 environment
  • 2895487 Copy Search Results" option does not work in an Exchange server 2013 environment
  • 2895500 DBCS characters appear garbled when you run some PowerShell scripts in EMS in an Exchange Server 2013 environment
  • 2895678 "Nombre de usuario\dominio" is displayed unexpectedly on the Spanish version of the OWA and EAC logon pages in an Exchange Server 2013 environment
  • 2902929 You cannot forward an external meeting request in an Exchange Server 2013 environment
  • 2902933 "Generate incident report" does not display the "Bcc" field in an Exchange Server 2013 environment
  • 2902934 Korean language localization issue in Exchange 2013 OWA user interface
  • 2902936 You cannot change SMTP addresses for distribution groups by using EAC in an Exchange Server 2013 environment
  • 2902938 You cannot preview Office documents in shared folders by using Outlook Web App in an Exchange Server 2013 environment
  • 2902939 EMS connection error when you separately install an Exchange Server 2013 Mailbox server and a Client Access server
  • 2883203 Exchange Server 2013 restarts frequently after Cumulative Update 2 is installed
  • 2890814 No redirection to the Outlook Web App URL for Exchange Online users in an Exchange hybrid deployment


Download Cumulative Update 3 for Exchange Server 2013 (KB2892464)

Version: 15.0.775.38
Date Published: 11/25/2013
File name: Exchange2013-x64-cu3.exe
File size: 1.5 GB
KB Articles: KB2892464

Download Exchange Server 2013 CU3 UM Language Packs

Downloads contain pre-recorded prompts, grammar files, text to speech data, Automatic Speech Recognition (ASR) files, and Voice Mail Preview capabilities for a specific language that is supported by Exchange 2013 CU3 Unified Messaging (UM). Warning: This UM language pack must only be installed as an add-in to Exchange Server 2013 CU3 Unified Messaging.

Version: 15.0.775.38
Date Published: 11/25/2013


Please Note: Cumulative Updates can be installed directly, i.e. no need to install RTM prior to Cumulative Updates, also note that once installed, you can’t uninstall a Cumulative Update nor any of the installed Exchange server roles. The order of upgrading servers is irrelevant, unlike with previous generations of Exchange.

For mote information visit MS Exchange Team Blog

For list of Exchange 2013 CU version visit Wiki page

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About the author

Arman Obosyan have more than 20+ years’ work experience in Information Technologies sector.

Last few years he working on a position Technology Strategist at Microsoft Corporation, In the past Arman was Head of IT Infrastructure in Governmental Central Bank of Georgia (National Bank of Georgia).

Nowadays Arman is supporting C-Level and enabling business, visionary with a passion of technology, trends.


Certified since 2003 year, passed following certifications MCP, MCSA, MCSE, MCTS, MCITP, Exin ITIL and VMware Certified Professional (VCP)

Founder / Lead of Microsoft Certified Professionals (MCP) Club Tbilisi and Community GE project 

In 2010 Was awarded a Microsoft Most Valuable Professional (MVP)

2017 MVP Reconnect


The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.

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