Operating systems requirements

  • Windows XP SP3

  • Windows Vista SP2

  • Windows 7

  • Mac OS X 10.5 (Leopard), 10.6 (Snow Leopard)

  • Windows Server 2003

  • Windows Server 2008

Office client requirements

  • Office 2007 SP2 or Office 2010

  • Office 2008 for Mac & Entourage 2008 Web Services Edition

  • Office 2011 for Mac and Outlook 2011 for Mac

  • .NET 2.0 or later

  • Lync 2010

Browser requirements—Administration Center and My Company Portal

  • Internet Explorer 7 or above

  • Firefox 3 or above

  • Safari 4 or above

  • Chrome 3 or above

Browser requirements—Outlook Web App

  • Internet Explorer 7 or above

  • Firefox 3 or above

  • Safari 3 or above on Macintosh OS X 10.5

  • Chrome 3 or above

  • Outlook Web App also has a light version that supports a reduced set of features across almost any browser

Active Directory

  • In order to use the optional directory sync and identity federation capabilities, your business's Active Directory must be a single forest.

Note for Mac users: At this time Communicator for Mac 2011 will not work with Office 365. See FAQ for additional information about Mac-related system requirements.

Note regarding Office Professional Plus in Office 365: Office Professional Plus is not designed to install on servers or virtualized platforms. Microsoft does not provide technical support services for customer and Partner issues related to the installation or use of Office 365 in a virtual environment, Windows Server Remote Desktop, or other terminal service platforms.