I am currently trying to follow the steps listed here:
However to add the delegated permission I need (EWS.AccessAsUser.All), the author suggests you should "Select Add a permission. On the Request API permissions page, select Exchange under Supported legacy APIs." This worked a few months back when I tried it in a prototype but the whole Exchange API under the "Legacy APIs" section appears to have been removed.
I can not find any mention of this anywhere on GitHub, SO or MSDN.
Please note some of the functionality I need is not yet supported in Microsoft Graph so using that API is not currently an option for me.
Any help would be appreciated.