DirSync object limit for SQL Server Express RRS feed

  • Question

  • I'm trying to find the correct group to post this question to:

    I'm trying to understand the limitations of SQL Server Express when used with DirSync.  There is a 50,000 object limit before needing to stand up a full SQL instance, and I would like to know if ActiveSync devices within my on-prem AD count towards this limit or if its just users, groups, and mail-enabled contacts.  The documentation is not very clear in this area.  Thanks.

    Tuesday, November 4, 2014 3:42 PM


  • Hi straussc,

    Firstly, for SQL Server Express, it has the following limitations:
    • 1 physical processor
    • 1 GB of RAM
    • 4 GB database size per database in SQL Server 2005 Express and SQL Server 2008 Express , 10 GB database size per database in SQL Server 2008 R2 Express and higher versions of SQL Server Express.

    Secondly, based on my research, all customers of Azure Active Directory and Office 365 have a default object limit of 50,000 mail-enabled objects (users, mail-enabled contacts, and groups) by default.  Assume that you use SQL Server 2008 R2 Express or higher version, when the total objects are more than 50000, it will cause your SQL Server Express databases to hit the 10 GB limit, then you need to set up a full SQL Server instance.

    Thirdly, for DirSync  issues, I would like to recommend that you ask the question in the Microsoft Office 365 forum at http://community.office365.com/en-us/f/default.aspx. It is appropriate and more experts will assist you.

    There are also some articles about DirSync for your reference.

    Lydia Zhang

    Thursday, November 6, 2014 2:54 AM