A partner created an application to connect to Calendar via EWS and this from an external internet server.
At one time this process takes 20 times longer then before without changing anything on Exchange level.
When we run the application from a domain joined computer it still works perfect.
To what can this latency be related?
Is there a difference between authentication, and if yes, why can it take up to 15sec ?
FYI : The application ran in the past and delivered an answer within 2 seconds. Now it's around 15sec ?
Thanks for your feedback !!!