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Drop-in replacement for the EWS Managed API. Your .NET code runs on Microsoft Graph, inside your application.

Product

Why Sunsetless
Compatibility
Check your EWS usage
Look up an EWS app ID
Free trial
Pricing
Migration service
.NET Framework migration

Resources

Getting started
Samples and issues on GitHub
Security
For software vendors

Guides

EWS retirement dates
Find apps using EWS
EWS app allow list
Dynamics 365 on-premises
Cisco Unity Connection
EWS 403 errors
EWS vs Graph differences
EWS streaming notifications
EWS item IDs
EWS extended properties
EWS impersonation
Hybrid Exchange code
EWS scripts in PowerShell
exchangelib after EWS
Web Forms on .NET 8, 10 or 11
WCF services on .NET 8, 10 or 11
System.Web on .NET 8, 10 or 11
Remoting and AppDomains
All guides

Company

Contact us
Customer sign-in

Legal

Terms and Conditions
Refund Policy
Privacy Policy
Service Terms

Made in the EU. Sunsetless is built and supported in Poland.

Sunsetless EWS includes code from the EWS Managed API, © Microsoft Corporation, licensed under the MIT License. Microsoft, Exchange, Outlook and Microsoft Graph are trademarks of the Microsoft group of companies. Sunsetless is not affiliated with, endorsed by, or sponsored by Microsoft.