Hello ,
for a client we developed a c# console application which has ran for the last 5 years twice a day using EWS managed api.
The application was built to syncronize contacts among 2 mailboxes , a master and a slave one.
It worked well until we upgraded the exchange server (worked trouh exchange 2010-2013 and 2016 ) to 2019.
Now the EWS managed api can't connect to the server.
I've been reading around that 2019 EWS only supports oAuth authentication , is that true ?
The application is running inside the client's network , therefore there is no need to implement such an authentication as oAuth for secuirity sake. I've also been reading that we should use Graphs instead of EWS , but i don't think Graphs work on 2019 on premise ...
How should i proceed to get my application start working again ? Any feedback would be much appreciated.
Thanks
Marco