First of all, thank you for the replies. I am a newbie to this Exchange/Office 365 and work in IDM field. What we are trying to do is : Using Java API, we want to connect to Exchange/Outlook365 and modify room delegate members.
In PS script, I know that it is done using 'set-CalendarProcessing' command, but want to do it using Java.
No, it's not for in-house Exchange deployments only, works fine with Office 365 as well. And deprecation will not happen anytime soon, what they say in the article is that EWS will not receive any new feature updates. It's still more feature-rich than anything the Graph has to offer.