Office 365 Online Help is the official source of Office 365 system requirements. This wiki supplements the system requirements page by providing additional context around changes to the Office 365 system requirements, including the when—and in cases why—those changes occur. You’ll also find information about less common support scenarios, such as hybrid deployments.

Changes to system requirements will also appear here before they appear in Office 365 Online Help, or in service alerts sent directly to you.

Explore requirements by functional or tactical category:

Change Log

Product Description Effective On Announced on/via
Internet Explorer

Office 365 is now designed to work with Internet Explorer 11 (IE11) and Internet Explorer 10 (IE10).

3 Dec 2013 3 Dec 2013
Here
Internet Explorer 11 Office 365 now supports Internet Explorer 11. Start working on your browser upgrade now! 17 Oct 2013 Windows 8.1 release
Office 2010 We have released Service Pack 2 for Office 2010. While we recommend immediate deployment of all service packs and public updates, Service Pack 2 is currently only required by 14 October 2014. 14 Oct 2014 Product Lifecycle
Outlook 2013 and Auto-mapping REMOVED
We are resolving this issue via a server side fix. Client hotfixes are no longer required
n/a n/a
Outlook 2010 and Auto-mapping REMOVED
We are resolving this issue via a server side fix. Client hotfixes are no longer required
n/a /na
Windows Vista Office 365 support for Windows Vista now follows its support lifecycle n/a 9 April 2013
Here
Windows XP Office 365 support for Windows XP now follows its support lifecycle. Support ends 8 April 2014 8 April 2014 9 Apr 2013
Here
Internet Explorer 12 months' advanced notice of Office 365's support for Internet Explorer 8 8 April 2014 9 Apr 2013
Here, and via emails sent later in April
Internet Explorer Internet Explorer 9 (IE9) and Internet Explorer 10 (IE10) are recommended for the best experience with Office 365.

Internet Explorer 8 (IE8) is supported, but Microsoft recommends IE8 users upgrade to IE9 or IE10.
27 February 2013 15 Feb 2013
Here
Outlook 2010 All public updates through November 2012 required by 8 April 2014 (specifically KB2687623) 8 April 2014 15 Feb 2013
Here, and via email in March 2013
Outlook 2007 All public updates through November 2012 required by 8 April 2014 (specifically KB2687404) 8 April 2014 15 Feb 2013
Here, and via email in March 2013
Office 2007  Requires Service Pack 3 8 January 2013 Normal operation of Service Pack support lifecycle (support for SP2 expiry)
Outlook 2007 and KB2583910 KB2583910 must be applied by 1 October 2013 1 Oct 2013 24 Oct 2013
Here, and via email
32-bit Directory Synchronization Tool End of Office 365's support 1 Jan 2013 24 Oct 2012
Here, and via email
Outlook 2010 and KB2553248 KB2553248 must be applied by 1 July 2013 1 Jul 2013 July 2012
Outlook 2010 Requires Service Pack 1 1 Jun 2012 23 Mar 2012
Firefox (non-current versions) End of Office 365's support for non-current versions. Firefox users should always use the latest production version (known as the “Release” version).  23 Mar 2012 23 Mar 2012
Chrome (non-current versions) End of support for non-current versions. Chrome users should always use the latest production version (known as the “Stable” version).   23 Mar 2012 23 Mar 2012
Internet Explorer 7 End of Office 365's support 1 Oct 12 23 Mar 2012,
and via email
Safari 4 End of Office 365's support 1 Oct 12 23 Mar 2012
Office 2008 for Mac End of Office 365's and Microsoft's support 9 Apr 13 23 Mar 2012,
and via email
Entourage 2008 Web Services Edition for Mac End of Office 365's and Microsoft's support 9 Apr 13 23 Mar 2012,
and via email
Windows Server 2003 End of Office 365's support for end-user client access 1 Jan 2013 23 Mar 2012
Windows Vista End of Office 365's support 1 Jan 2014 Superseded by later change. See above 23 Mar 2012,
and via email
Windows XP End of Office 365's support. 1 Jan 2014 Superseded by later change. See above. 23 Mar 2012,
and via email
Outlook 2003 End of Office 365's and Microsoft's support 8 Apr 2014 23 Mar 2012,
and via email