The directory data source is used to collect data from Active Directory in order to refresh the structure of the Exchange organization in the database: Exchange servers, DAGs, mailbox and public folder databases, recipients and their attributes.
This option supports both On-Premises versions of Microsoft Exchange Server, and Office 365. One of the check boxes may be grayed out depending on your Exchange environment. For example, both check boxes will be active if your environment runs in Hybrid mode; but the Office 365 check box will be grayed out if you only use an On-Premises version of Microsoft Exchange Server such as Exchange 2013.
Use this option to populate your database, and then to update its content.
| On-Premises (LDAP queries against a Global Catalog Server) | No import | No directory import operation is performed if this option is selected. This option is only available if the last update or complete re-import was carried out less than 24 hours ago. |
| Quick Update (get and process modified recipients only) | This option searches for new recipients in the directory, or known recipients that have been modified
since the last import. Objects USN (Update Sequence Number) are used for this
purpose. The import process will be much faster. However, an object that was recently
deleted in the directory will not be marked as deleted in the database.
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| Complete import (get and process all recipients) | This option allows re-importing all Exchange-related objects, including existing
and already known recipients. Objects that can no longer be found in the directory,
but that are still present in the
database, will be marked as deleted. Running a complete directory reimport can be useful if you need to force synchronization between the directory and the
database.
Note: This option is the only available when the directory is imported for the first time. |
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| Office 365 (PowerShell commands against the Cloud) | No import | No import operation is performed against Office 365 if this option is selected. This option is only available if the last update or complete re-import was carried out less than 24 hours ago. |
| Quick Update (get and process modified recipients only) | This option searches for new recipients in the hosted organization, or known recipients that have been modified since the last import. | |
| Full Update (get all recipients and only process the modified ones) | This option allows re-importing all Exchange-related objects, including existing
and already known recipients. However, it only processes those that were found to have been modified since the last import took place. Note: This option is the only available when the directory is imported for the first time. |
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| Complete import (get and process all recipients) | This option is a deep variant of the previous one, which re-examines all recipients and all their attributes. Using it is not recommended if your Office 365 tenant is very large. |
If your organization runs in Hybrid mode, the directory will be imported using the On-Premises method first, and then using the Office 365 method.
At the end of the process, a summary report is displayed to summarize what has been imported and the errors and warnings that may have occurred.