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Microsoft recommends the following minimum general hardware requirements to run Outlook on the Web. These requirements therefore also apply to running the Cryptshare for OWA Add-in.

We strongly suggest exceeding these requirements, as the Outlook web app may be demanding at times. Older devices may be served the "light version" of Outlook, which does not support add-ins.

Official Microsoft recommended requirements, as of September 2023:

  • Processor: 1.6 GHz or higher, or Intel-based Mac computer
  • Memory: 1 GB of RAM or higher
  • Resolution: 1024 × 768 minimum
  • Internet connection: High-speed internet access is recommended.

Operating System

These requirements match the Microsoft recommendations. It is advised to generally use the latest operating system version available.

  • Windows 7 or later
  • Mac OS X 10.10 or later
  • Linux: Known to work in Firefox and Chrome. Some features may not be available.

Web Browsers

Browser Minimum supported version
Chrome Newest version on Windows and on other platforms
Firefox Newest version and extended support version on standard desktop
Safari Newest version on MacOS
Microsoft Edge Newest version on Win & Mac
Unsupported Browsers
In line with Microsoft browser support, other browsers such as IE11 & Edge Legacy and all mobile browsers are not supported.

Cryptshare Server Environment

For more details about setting up the Cryptshare Server environment, refer to Server Environment.

Exchange Online / Outlook Environment

In order to be able to use the Cryptshare for OWA add-in, an active Microsoft 365 (formerly Office 365) subscription including Exchange Online and the ability to sideload add-ins is required.

Cryptshare for OWA was created for Outlook on the Web. Most features should work with little to no restrictions in the Outlook for Windows Desktop Client.