Microsoft Graph API support for on premise Exchange

[cstest cstest]

Hi,

Would like to know whether Microsoft Graph APIs support on premise Exchange. Thanks.

Best regards

Pavan

[#2]

No. Graph doesn't even support Exchange Online :)

[#3]

@Vasil Michev as far as I know Graph API works very well with online Exchange Server.

[#4]

@cstest cstest 

I think it is possible now (Public Preview) but you need to have a Hybrid Exchange scenario.

https://docs.microsoft.com/en-us/graph/hybrid-rest-support

[#5]

This doesn't actually work.

[#6]

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 enable OAuth in EWS for accessing Exchange Online only, if the Graph API switch does not work for you)

[#7]

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