We sell a third party system that interacts with MS Exchange Server using EWS. The developers are having trouble with the install onto the customer's on-premise 2010 Exchange Server - specifically with the login credentials. The customer uses a different format to the one on the software to be installed i.e. Exchange server is expecting domain/username format not name@[login to view URL]
Everyone involved (me, the software developers and the client) is in the UK. If you are sure you can help, please apply.