Forum Discussion
App Proxy and Exchange Hybrid
I have what appears to be a odd scenario. I would like to enable the Exchange Hybrid config, however I don't want to expose my on-prem Exchange servers to the internet. I was thinking I could potenti...
VasilMichev That's the path I went but I still needed my autodiscover publicly available. 
you can try to allow only microsoft ip ranges https://docs.microsoft.com/de-de/office365/enterprise/urls-and-ip-address-ranges
