HOTSPOT
You have an Exchange Server 2013 organization named contoso.com.
Contoso.com has a federated trust to another Exchange Server 2013 organization named
fabrikam.com.
You need to ensure that users from fabrikam.com can view the availability of users in contoso.com.
What command should you run? To answer, select the appropriate options in the answer area.
Answer: 
Explanation:
* New-OrganizationRelationship
Use the New-OrganizationRelationship cmdlet to create a relationship with an external Microsoft
Exchange Server 2010 and Exchange Server 2013 organization for the purpose of accessing calendar
free/busy information or moving mailboxes between on-premises Exchange servers and the
Exchange Online service as part of a hybrid deployment.
/ The DomainNames parameter specifies the SMTP domains of the external organization. If adding
multiple domain names, separate each entry with a comma.
/ The FreeBusyAccessEnabled parameter specifies whether this organization relationship should be
used for retrieving free/busy information from the external organization. The valid values for this
parameter are $true or $false. The default value is $false.
Incorrect:
* The Set-AvailabilityConfig cmdlet defines two accounts or security groups: a per-user free/busy
proxy account or group, and an organization-wide free/busy proxy account or group. These accounts
and groups are trusted by all availability services in the current organization for availability proxy
requests.
* There is no cmdlet Set-AvailabilityAddressSpace.
New-OrganizationRelationship
https://technet.microsoft.com/en-us/library/ee332357(v=exchg.150).aspx