Forum Discussion

cstest cstest

Copper Contributor

Jan 31, 2020

Microsoft Graph API support for on premise Exchange

Hi, Would like to know whether Microsoft Graph APIs support on premise Exchange. Thanks. Best regards Pavan

Copper Contributor

Feb 10, 2023

In specific, check out the following statement in the subsequent link of the shared link:
"But we have no plans currently to change the way EWS works on-premises, so using Graph for Exchange Online and EWS for Exchange Server on-premises is the current recommendation."

(this comes with the hint that you can also https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-authenticate-an-ews-application-by-using-oauth for accessing Exchange Online only, if the Graph API switch does not work for you)

Alexander_Stromer

Copper Contributor

Oct 06, 2023

EWS online will be retired with Oct 2026, so the golden rule today (Oct 2023) is:

1. use EWS for on-premise Exchange

2. use Microsoft Graph for Exchange Online

kguelzau
Copper Contributor
Jan 21, 2025
And since MS also retired the EWS Client Libs https://github.com/OfficeDev/ews-java-api / https://github.com/OfficeDev/ews-managed-api you are forced to create your own clients for the on-prem EWS API.