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Exchange 2013: Cumulative Update 6 Released

Microsoft today released Cumulative Update 6 for Exchange 2013 today.


Exchange 2013 Cumulative Update 6 can be downloaded from here

Issues fix list can be found here –

Updated release notes can be found here.


There are 2 big fixes will be taken care by CU6.

  1. Public Folder Scalability – CU6 raises the Public folder count limit to 100,000 folders

    The below command will show the current count of the Public Folders.

    Get-PublicFolder –Recurse –ResultSize Unlimited | Measure-Object

    Not only the scalability but more small changes coming to the Public Folders which can be read here


  2. The fix for Hybrid Configuration Wizard issue which was discussed in KB 2988229 is included in cumulative update 6.


Similar to other releases this release will also need the following:

  1. Testing the in the lab.
  2. Backup of production exchange databases
  3. Planning the AD schema update
  4. Isolate schema master and update the schema as discussed here.



Prabhat Nigam

Microsoft Solutions Architect | Exchange Server


3 Responses to “Exchange 2013: Cumulative Update 6 Released”

  1. Brian Parker Says:

    I need some serious help. I was installing the exchange 2013 SP1 on a 2012R2 server. It failed 1/2 way through. I called my supposed hired gurus and they did worse than I did. They deleted the Default Web Site, and proceeded to mess my installation up to the point that I can’t see straight.

    I managed to recreate all the virtual directories, except the ecp directory. I can’t get it to remove, so I can recreate it.

    I have been up 24 hours working on this and I can’t go much further. I can be reached at my other work email since I can’t get Exchange running.

    Any help is greatly appreciated.


  2. Prabhat Nigam Says:


    Sorry to here about the issue.
    I can recommend the below solution but take the backup of your Exchange (databases) and AD (systemstate)

    1. Backup Exchange databases
    2. Uninstall IIS then restart the server.
    3. Install IIS and restart the server.
    4. Reinstall Exchange 2013 and restart the server.

  3. Exchange 2013: Cumulative Update 6 Installation « Says:

    […] We also shared the release notes here. […]

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