Client PC
Operating System:
| • | Supported: Windows 10, (64-bit versions only) with latest updates | 
| • | Un-tested but should work: Windows 8.1 (64-bit versions only) and server versions of Microsoft Windows (2012 and above) | 
 
Other requirements:
| • | Microsoft .NET Framework 4.6.1 or newer | 
 
Hardware recommendations:
| • | Intel Processor 2.5 gigahertz (GHz) or faster, minimum 2-core | 
| • | Memory 8 GB RAM or greater | 
| • | 1280 x 768 minimum screen resolution | 
| • | Hard disk speed 7200 rpm or SSD | 
 
| • | Not supported: Microsoft Surface Pro with ARM processor | 
Microsoft Outlook:
| • | Not supported: Pre-installed installations and "The Office app for Windows 10" are NOT compatible with Outlook add-ins like Mail Manager for Windows, uninstall and install or repair  the commercially licenced version of Office | 
| • | Not supported: Outlook for Mac | 
| • | Supported: Licenced Windows versions of Microsoft 365 or Outlook 2019 (64 bit or 32 bit versions) | 
| • | Have the latest Microsoft Outlook 2019 updates. For Microsoft 365 we recommend using the semi-annual channel (previously called: Deferred Channel) | 
| • | Outlook configured to "Use Cached Exchange Mode" with Microsoft Exchange Online | 
 
Email Server:
| • | Supported: Microsoft Exchange Online or Microsoft Exchange Server 2016 on-premise |