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About Google Apps Password Sync

Google Apps Password Sync (GAPS) automatically keeps your users' Google Apps passwords in sync with their Microsoft® Active Directory® passwords. Whenever a user's Active Directory password is changed, GAPS pushes the change to Google Apps immediately.

Important: GAPS never changes your Active Directory passwords; it only syncs Active Directory password changes to Google Apps.

System requirements

  • Microsoft Active Directory versions:
    • Microsoft Active Directory 2003. If you are using Microsoft Windows Server® 2003, ensure that KB938397 is installed to enable support for certificates secured with SHA-2 family of hashing algorithms. More information can be found on the Windows PKI blog.

      Note: Microsoft Active Directory 2003 will not be supported in future versions of GAPS.

    • Microsoft Active Directory 2008 or 2012 (AD DS, not AD LDS). Windows Server Core editions are not supported. 
  • Google Apps for Work, Education, or Government.

Set up your Domain Controllers

  • GAPS must be installed on all Domain Controllers.
  • Domain Controllers need an Internet connection to connect to the following sites/ports:


    Purpose URL Port number
    API access 443
    Certificate Revocation Lists / Online Certificate Status Protocol

    Note: The certificate authority URLs can change at any point. For the most recent list of CRL/OCSP URLs, review the certificate information of the above API and Authentication hosts.

Download GAPS 

Download the correct MSI for your server's architecture:

Additional documentation

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