Office 365 requirements

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Office 365 System Requirements

Microsoft Office 365 works well with several browsers, operating systems, and supporting software, and the table below shows the software supported by Office 365.

Software and Browswers supported by Office 365

SoftwareSupported Version
Operating systemsWindows 7Windows Vista® SP2Windows Media CenterWindows XP Home Windows XP SP3 with RPC over HTTP patchMac OS X 10.4 (Tiger), 10.5 (Leopard), 10.6 (Snow Leopard)
System softwareMicrosoft .NET Framework 3.0 (for Windows XP) Java client 1.4.2 (for Macintosh OS X)*
Office ClientsMicrosoft Office Professional Plus Office 2010 Office 2007 SP2Microsoft Entourage® 2008 Web Services Edition.NET 2.0 or laterLync 2010 (included in Office 365 Plan P1)Mac Messenger 9
MobilityFor Exchange Online: Microsoft Windows Mobile® and Windows Phone, Nokia E and N series devices, Android, Palm devices, Apple iPhone, and iPad, Blackberry*For SharePoint Online: Windows Mobile 6.5.x, Nokia E series and N series devices, Android, Apple iPhone 2.0+*Blackberry operates using the Blackberry Internet Service (BIS). Blackberry Exchange Services (BES) is not supported in Office 365 Plan P1
Client applicationsOffice desktop set up
Browser software – Office 365 PortalWindows Internet Explorer® 7 or above for Vista and Windows 7Windows Internet Explorer 8 (required for XP)Mozilla Firefox 3.xApple Safari 3.x
Browser softwareOutlook Web AppInternet Explorer 7 or above Firefox 3 or higher Safari 3 or higher on Macintosh OS X 10.5Chrome 3 and later versions
Browser softwareOutlook Web App Light**Microsoft Internet Explorer 5.5 or aboveFirefox 2 or higherSafari 3 or higherOpera

(** Outlook Web App Light is designed to optimize the OWA experience for slower connections and alternative Web browsers. For more information about the differences between OWA Premium and OWA Light, see TechNet: Client Features in Outlook Web App (http://technet.microsoft.com/en-us/library/aa997437.aspx).

Office 365 Recommended Operating Systems and Software

For an optimal user experience within Office 365, the following operating systems and software are suggested:

  • Windows 7
  • Office 2010 or Office Professional Plus[1]
  • Internet Explorer 8
  • Lync 2010 (included in Office 365 Plan P1)
  • Office desktop set up (an installable piece of software included in Office 365 Plan P1)

Office 365 – Operating Systems and Software Not Supported 

These following operating systems and software versions are not supported when using Office 365:

  • Windows Server® 2003
  • Microsoft Office Outlook 2003
  • Microsoft Internet Explorer 6
  • Microsoft Office Communicator 2007

Rather than using these operating systems and software, we highly suggest that you upgrade to the versions listed in the Recommended Operating Systems and Software section. 

How to use Office 365 on Desktop Applications

For an optimal experience with Office 365, a set of necessary components and updates must be applied to each computer. To ease the installation and maintenance of these components and updates, MS gives an installable piece of software (“Office desktop set up”) at no additional charge. These updates are necessary for each workstation that uses rich clients (such as Microsoft Office 2010) and connects to the MS Online Services.

Office desktop set up offers several key benefits:

  • Prepares PCs to connect to Office 365 by applying required updates
  • Sets up Outlook and Microsoft Lync™ for usage with Office 365

A list of these update requirements will be published for companies that want to use an alternative method of deploying the updates.


[1] MS Office Professional Plus is available for subscription through the Office 365 Admin Portal

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