Since there are already a lot of howto’s on the web on how to build a hybrid setup for Exchange 2013, I came across this alternative way to configure this whole thing with Oauth.
The problem I had and many others with me is that after configuring the Hybrid setup (manual or with the HCW) free/busy lookups were not working or maybe only working in a one way direction. Even after working with Microsoft Escalation Engineers for several days on what seems as such a small issue I needed a fast way to make this working. Microsoft recommended Oauth. Here is briefly how it works: Continue reading “Configure a Hybrid Exchange 2013 environment with Oauth”