- OBM version 6.15.0.0 or above is installed on all MS Exchange node with Mailbox role.
- If you are using Exchange 2013 on Windows Server 2012, ".Net Framework 3.5 Features" is installed from the Add Roles and Features Wizard
- Microsoft Messaging Application Programming Interface (MAPI) is installed on the MS Exchange server. (Microsoft Exchange Server MAPI Client and Collaboration Data Objects Version 1.2.1 March 2014 Update or later)
- The operating system account to be running the Brick-Level backup (e.g. administrator) must have a mailbox and is not hidden from the Global Mailbox List.
For OBM version 6.5.4.0 or above, scheduled backup can be performed without changing the scheduler service's log on setting.
Scheduled backup is performed using the operating system account configured in the [User Authentication for Windows] field.
If such setting is not configured, the scheduled backup would precede with the default Local System account (default log on account for OBM scheduler).
In this case, the backup will most likely fail with permission denied error.
For OBM version 6.9.2.0 or above, mailbox items can be restored to a different Exchange Server on the same version or to a different Exchange Server on different version.
- For the backup with DAG option, scheduled backup is required, as all the OBM on different Exchange servers will base on the scheduled backup time to activate all the backups at the same time, even all these Exchange servers are located at different timezones.
When the backup on all Exchange servers are finished, a single email report will be generated.
Manual backup is not considered, as this will be considered as individual Exchange mail level backup not an Exchange mail level DAG backup.
- The LAN Manager authentication level is set to NTLMv2, as per this Microsoft TechNet article.
- Ensure the HTTP binding on the Default Web Site in Internet Information Services (IIS) is not missing or invalid. You may consider to clear the host name value if there is an existing binding, or create a new binding with no host name and a value of "All Unassigned" IP address
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