Microsoft Office 365 needs the following system requirements to operate effectively.
| Operating system | Windows 10, Windows 8.1, Windows 8, Windows 7 Service Pack 1 |
| Windows 10 Server, Windows Server 2012 R2, Windows Server 2012, or Windows Server 2008 R2 | |
| Browser | Safari, Chrome, and Firefox – current version |
| Microsoft Edge - latest version | |
| Internet Explorer – current or immediately previous version | |
| Email client software | Office/Outlook 2016 |
| Office/Outlook 2013 with SP1 | |
| Office/Outlook 2010 with SP2 | |
| Office/Outlook 2007 with SP3 | |
| Outlook for Macintosh – Office for Mac2016 | |
| Computer and processor | 1 GHZ or faster x86 or 64-bit processor with SSE2 instruction set |
| 1 GB RAM (32-bit) | |
| Memory | 2 GB RAM (64-bit) recommended for graphics features, Outlook Instant Search & certain advanced functionality |
| Disk space | 3 gigabytes (GB) |
| Monitor resolution | 1024 x 768 |
| Exchange ActiveSync must be supported for Office 365 | |
| Mobile devices | BT Business Email Lite (powered by Microsoft Office 365) requires POP to be supported |
| Using Outlook Web App on smartphones and tablets | For the best experience use the integrated web browser of these devices, Windows 8 tablet, iOS 6 or later versions for iPhone4s or later versions or iOS 6 or later versions for iPad2 or later versions |