Your company has an Exchange Server 2010 Service Pack 1 (SP1) organization and a hybrid deployment of Office 365. Microsoft Exchange Server on-premises users report that they cannot view the free/busy

Your company has an Exchange Server 2010 Service Pack 1 (SP1) organization and a hybrid deployment of Office 365. Microsoft Exchange Server on-premises users report that they cannot view the free/busy information of Microsoft Exchange Online users. You suspect a certificate problem. You need to identify whether a certificate problem is causing the issue. Which PowerShell cmdlet should you use?