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Exchange 2013 : 100 Databases are back with CU2

Microsoft would like to give us 100 databases per server /DAG same as Exchange 2010 with cumulative update 2 which is expected to be released in the 3rd quarter of the year 2013.


As a matter of fact we can go from 50 databases to 100 Databases per server or Database Availability Group.

This means we can plan/design to deploy 100 databases if there is a requirement for future projects.

This increase in the database will only be helpful for Enterprise Edition of Exchange 2013.

CU2 won’t change number of databases per server for standard edition which will remain at 5 databases per server/DAG.

CU2 will allow your DAG Witness Server to be located in Azure. This will be a great advantage to have no outage of Witness.

CU2 will also provide DAG Management Service.


For more information you can read the blog post from “Ross Smith”.


Following issue will be fixed in CU2

You can’t disable Outlook Web App access for users in Office 365 or on-premises Exchange Server –


Prabhat Nigam

Microsoft MVP | Exchange Server


9 Responses to “Exchange 2013 : 100 Databases are back with CU2”

  1. john Says:

    Our Enterprise is on Exchange 2013 CU1 On-Premises and it Rocks, looking forward to CU2.

    After the recent news of “NSA backdoor access to the Public Cloud servers”, many Enterprises are considering Exchange 2013 On-Premises.

  2. Prabhat Nigam Says:

    Great to know !
    As always, test the CU2 in you lab before deploying into production when it comes.
    I am not sure about NSA backdoor access to the Public Cloud servers but it is always good to have all yours emails in your hand. This is totally my point of view. 🙂

  3. Tom Says:

    Agree with Prabhat & John 100%.

    Well everyone knows it by now after the recent international news of “NSA backdoor access to the Public Cloud servers”.

  4. Prabhat Nigam Says:

    Thank you Tom for sharing. So, all the system admins jobs are secure.

    As far as you don’t do anything wrong they will not harm your data.

  5. Pathel Says:

    Have you all seen the new commercial from Public Cloud companies?

    “Do not worry about your Emails and data, even if our servers goes down & we lose your Emails and data, NSA has it” 🙂 LOL

  6. Prabhat Nigam Says:

    We are living in Exchange 2007.2010,2013 age where there is no data loss. I would recommend you to Upgrade your legacy system.

  7. ilhami Says:

    I tried to install Exchange server 2013 CU2 .I have an error and installation is stopped. The error is:

    the following error was generated when error clear if get service msexchangeservicehost
    microsoft exchange service host service failed to start

    How can I fix it? Thank you for recommendations. I am waiting your answers.

  8. Prabhat Nigam Says:

    There must be something wrong. Please check the setup.log for more information about the error.
    Please check the installation steps here.

  9. Jonsen Says:

    very good article. I like it. Thanks for sharing……

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