A company deploys an Office 365 tenant in a hybrid configuration with Exchange Server 2013. Office 365 users cannot see free/busy information that is published
from the on-premises Exchange Server. In addition, Exchange Server users cannot see free/busy information that is published from Office 365.
You need to troubleshoot why users cannot access free/busy information from both Office 365 and Exchange Server 2013.
Which tool should you run?

A.
The Hybrid Configuration wizard

B.
The Remote Connectivity Analyzer with the Exchange Server tab selected

C.
The Microsoft Connectivity Analyzer Tool

D.
The Remote Connectivity Analyzer with the Office 365 tab selected

Explanation:
https://testconnectivity.microsoft.com/