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How to use the EMC to create a database availability group
1. Run EMC.
2. Navigate to Organization Configuration > Mailbox.
3. In the action pane, click New Database Availability Group.
4. On the New Database Availability Group page, enter the
following information for the new DAG:
Database availability group name Use this box to type a valid and unique
name for the DAG of up to 15 characters. The name is equivalent to a
computer name, and a corresponding Cluster Network Object (CNO) will be
created in Active Directory with the name of the DAG. The name of the DAG
isn't used by end users or administrators. It is used only by the system for
internal communication and to secure the DAG.
Witness Server Select this check box and use the corresponding text box to
specify a witness server for the DAG. If you don't select this check box,
the system will attempt to automatically select a Hub Transport server that
doesn't have the Mailbox server role installed to be used as the witness
server.
Note:
If you specify a witness server, you must use either a host name or a
fully-qualified domain name (FQDN). Using an IP address or a wildcard name
isn't supported. In addition, the witness server cannot be a member of the
DAG.
Witness Directory Select this check box and use the corresponding text box
to type the path to a directory that will be used to store witness data. If
the directory doesn't exist, the system will create it for you on the
witness server. If you don't select this check box, the default directory
will be created on the witness server.
5. Click New to create the database availability group.
6. On the Completion page, review the following, and then
click Finish to close the wizard:
7. Click Finish to close the wizard.
Note: After you create a DAG, it will be configured to use DHCP. If you
don't want the DAG to use DHCP, you can use the Set-DatabaseAvailabilityGroup
cmdlet to configure one or more IP addresses for the DAG.
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