Deployment use cases for real-time push notifications

this document addresses the following use cases email+ uses apptunnel to tunnel ews traffic to the exchange server this setup only supports basic authentication to the ews service email+ uses tunnel to tunnel all traffic to the exchange server this setup supports basic, modern auth, and identity certificates to authenticate to the ews service if your existing email+ deployment uses a standalone sentry for activesync and your exchange web service (ews) is set up to use certificates, you have to disable activesync on standalone sentry and set up tunnel