We are migrating from Exchange 2003 to 2010 and as part of this migration I need to update some clientside c# apps which update/create calendar appointments in Exchange.
These apps were using WEBDAV and HTTP/XML requests to update Exchange. I understand I need to convert these apps to use the managed EWS API. I have downloaded some code samples from the Microsoft site and have these working but I need a understanding of how to uniquely identify these appointments so I can update/create them from a local database.
In the current apps when creating the HHTP request the URI would contain the ID to create the appointment :
12345 would be the ID from the local database to identify the appointment.
Now my question is how do I go above achieving the same results using EWS ? There are already 100s of appointments in our exchange server in this format so when I upgrade I still need to identify the appointment in the same way.
I would love some help with this as I only have just over a week to update the current applications!