Note An organization relationship is necessary to share free/busy information in an on-premises environment in a hybrid scenario. Please see the "More Information" section.
For example, if the default permissions are set to Free/Busy time, all users in the remote forest see only the free/busy time:
The cross-forest user cannot open the calendar directly and cannot view details based on their individually granted permissions. However, they can do these things by adding another folder in Outlook. To do this, a user clicks File, clicks Open, and then clicks Other User’s Folder. If the cross-forest user is granted reviewer or other permissions, the user can see details about the items in the calendar.
The user may see the subjects of the meetings from the calendar:
The user can also open and change calendar items:
Note Folder-level permissions are transferred when a mailbox is migrated to the cloud. Or, the permissions can be added if the object that represents the other user is mail-enabled and can be monitored by an access control list (that is, if the value of the msExchRecipientDisplayType attribute is set to -1073741818).
For administratorsFor free/busy information to be shared between an on-premises environment and the cloud (hybrid), an organization relationship must be created. The properties that control the free/busy data shared across the forest are as follows:
- AvailabilityOnly (Free/Busy time)
- LimitedDetails (Free/Busy time, subject, location)
Sharing policies will function similarly for remote organizations. For more information, see New-SharingPolicy.
For usersThe user controls how much free/busy information is displayed to users in a remote forest by using the Permissions tab in Calendar Properties in Outlook.
Scheduling Assistant displays the free/busy details that are configured by using the default permissions:
For more information about cross-forest free/busy configuration, click the following article number to view the article in the Microsoft Knowledge Base:
Article ID: 3079932 - Last Review: 17 Jul 2015 - Revision: 1