Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2
Topic Last Modified: 2012-11-19
Use the Add-MailboxDatabaseCopy cmdlet to add a new mailbox database copy to an existing database.
Syntax
Add-MailboxDatabaseCopy -Identity
<DatabaseIdParameter> -MailboxServer
<MailboxServerIdParameter> [-ActivationPreference
<UInt32>] [-Confirm [<SwitchParameter>]]
[-DomainController <Fqdn>] [-ReplayLagTime
<EnhancedTimeSpan>] [-SeedingPostponed
<SwitchParameter>] [-TruncationLagTime
<EnhancedTimeSpan>] [-WhatIf
[<SwitchParameter>]]
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Detailed Description
To use the Add-MailboxDatabaseCopy cmdlet to add a mailbox database copy, the following criteria must be met:
- The specified database must be a mailbox database. The
Add-MailboxDatabaseCopy cmdlet can't be used to create
copies of public folder databases. Use public folder replication
for public folder data redundancy.
- The specified Mailbox server must be in the same database
availability group (DAG), and the DAG must have quorum and be
healthy.
- The specified Mailbox server must not already host a copy of
the specified mailbox database.
- The database path used by the specified database must also be
available on the specified Mailbox server, because all copies of a
database must use the same path.
- If you're adding the second copy of a database (for example,
adding the first passive copy of the database), circular logging
must not be enabled for the specified mailbox database. If circular
logging is enabled, you must first disable it. After the mailbox
database copy has been added, circular logging can be enabled.
After enabling circular logging for a replicated mailbox database,
continuous replication circular logging (CRCL) is used instead of
JET circular logging. If you're adding the third or subsequent copy
of a database, CRCL can remain enabled.
After running the Add-MailboxDatabaseCopy cmdlet, the new copy will remain in a Suspended state if the SeedingPostponed parameter is specified. When the database copy status is set to Suspended, the SuspendMessage is set to "Replication is suspended for database copy '{0}' because database needs to be seeded."
You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Mailbox database copies" entry in the High Availability Permissions topic.
Parameters
| Parameter | Required | Type | Description |
|---|---|---|---|
|
Identity |
Required |
Microsoft.Exchange.Configuration.Tasks.DatabaseIdParameter |
The Identity parameter specifies the name of the mailbox database being copied. Database names must be unique within the Exchange organization. |
|
MailboxServer |
Required |
Microsoft.Exchange.Configuration.Tasks.MailboxServerIdParameter |
The MailboxServer parameter specifies the name of the server that will host the database copy. This server must be a member of the same DAG and must not already host a copy of the database. |
|
ActivationPreference |
Optional |
System.UInt32 |
The value of the ActivationPreference parameter is used as part of Active Manager's best copy selection process and to redistribute active mailbox databases throughout the DAG when using the RedistributeActiveDatabases.ps1 script. The value for the activation preference is a number equal to or greater than 1, where 1 is at the top of the preference order. The preference number can't be larger than the number of copies of the mailbox database. |
|
Confirm |
Optional |
System.Management.Automation.SwitchParameter |
The Confirm switch causes the command to pause processing and requires you to acknowledge what the command will do before processing continues. You don't have to specify a value with the Confirm switch. |
|
DomainController |
Optional |
Microsoft.Exchange.Data.Fqdn |
The DomainController parameter specifies the fully qualified domain name (FQDN) of the domain controller that writes this configuration change to Active Directory. |
|
ReplayLagTime |
Optional |
Microsoft.Exchange.Data.EnhancedTimeSpan |
The ReplayLagTime parameter specifies the amount of time that the Microsoft Exchange Replication service should wait before replaying log files that have been copied to the database copy. The format for this parameter is (Days.Hours:Minutes:Seconds). The default setting for this value is 0 seconds. The maximum allowable setting for this value is 14 days. The minimum allowable setting is 0 seconds, and setting this value to 0 seconds eliminates any delay in log replay activity. |
|
SeedingPostponed |
Optional |
System.Management.Automation.SwitchParameter |
The SeedingPostponed parameter specifies that the task not seed the database copy. You must then explicitly seed the database copy. |
|
TruncationLagTime |
Optional |
Microsoft.Exchange.Data.EnhancedTimeSpan |
The TruncationLagTime parameter specifies the amount of time that the Microsoft Exchange Replication service should wait before truncating log files that have replayed into a copy of the database. The time period begins after the log has been successfully replayed into the copy of the database. The format for this parameter is (Days.Hours:Minutes:Seconds). The maximum allowable setting for this value is 14 days. The minimum allowable setting is 0 seconds, and setting this value to 0 seconds eliminates any delay in log truncation activity. |
|
WhatIf |
Optional |
System.Management.Automation.SwitchParameter |
The WhatIf switch instructs the command to simulate the actions that it would take on the object. By using the WhatIf switch, you can view what changes would occur without having to apply any of those changes. You don't have to specify a value with the WhatIf switch. |
Input Types
To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.
Return Types
To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.
Examples
EXAMPLE 1
This example adds a copy of mailbox database DB1 to the Mailbox server MBX3. Replay lag time and truncation lag time are configured with values of 10 minutes and 15 minutes, respectively. The activation preference is configured with a value of 2.
 Copy Code |
|
|---|---|
Add-MailboxDatabaseCopy -Identity DB1 -MailboxServer MBX3 -ReplayLagTime 00:10:00 -TruncationLagTime 00:15:00 -ActivationPreference 2 |
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EXAMPLE 2
This example adds a copy of mailbox database DB2 to the Mailbox server MBX1. Replay lag time and truncation lag time are left at the default values of zero, and the activation preference is configured with a value of 3.
| Copy Code |
|
|---|---|
Add-MailboxDatabaseCopy -Identity DB2 -MailboxServer MBX1 -ActivationPreference 3 |
|
EXAMPLE 3
This example adds a copy of mailbox database DB3 to the Mailbox server MBX4. Replay lag time and truncation lag time are left at the default values of zero, and the activation preference is configured with a value of 5. In addition, seeding is being postponed for this copy so that it can be seeded using a local source server instead of the current active database copy, which is geographically distant from MBX4.
| Copy Code |
|
|---|---|
Add-MailboxDatabaseCopy -Identity DB3 -MailboxServer MBX4 -ActivationPreference 5 -SeedingPostponed |
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