Your company has a hybrid deployment of Office 365. You need to verify whether free/busy information sharing with external users is configured.
Which Windows PowerShell cmdlet should you use? created for federated sharing with other federated Exchange organizations or for hybrid deployments with click Start, click All Programs, click Microsoft Exchange Server 2010, and then click Exchange Management domainname In this command, the placeholder represents the default Office 365 domain (for example, adatum.onmicrosoft.com). the target domain must have to make sure that the federation trust is set up correctly. command: Get-OrganizationRelationship | FL

A.
Test-OutlookConnectivity

B.
Test-FederationTrust

C.
Get-OrganizationRelationship

D.
Get-MSOLDomainFederationSettings

Explanation:

How to troubleshoot free/busy issues in a hybrid deployment of on-premises ExchangeServer and Exchange
Online in Office 365
Use the Get-OrganizationRelationship cmdlet to retrieve settings for an organization relationship that has been
ExchangeOnline. You can use this information to troubleshoot free/busy issues in a hybrid deployment.
In more detail (see step 4 below):
To help troubleshoot this issue, follow these steps:
On an on-premises computer that’s running Microsoft Exchange 2010 Server Service Pack 1 (SP1),
Shell.
At the command line, type the following command, and then press Enter: Get-FederationInformation –
In the results, note the TargetApplicationUri and TargetAutodiscoverEpr values. These are the settings that
To display the trust information that is currently set up for the default Office 365 domain, run the following