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Add-MailboxDatabaseCopy

Use the Add-MailboxDatabaseCopy cmdlet to create a passive copy of an existing active mailbox database. Exchange PowerShell reference

From the Exchange PowerShell reference 11 parameters Its page in the reference

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Parameters

11 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the mailbox database that's being copied.
-MailboxServerThe MailboxServer parameter specifies the name of the server that hosts the database copy.
-ActivationPreferenceThe ActivationPreference parameter value is used as part of Active Manager's best copy selection process and to redistribute active mailbox databases throughout the DAG when using the RedistributeAct…
-ConfigurationOnlyThe ConfigurationOnly switch allows database copies to be added without invoking automatic seeding.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-ReplayLagMaxDelayThe ReplayLagMaxDelay parameter specifies the maximum delay for lagged database copy play down (also known as deferred lagged copy play down).
-ReplayLagTimeThe ReplayLagTime parameter specifies the amount of time that the Microsoft Exchange Replication service waits before replaying log files that have been copied to the database copy.
-SeedingPostponedThe SeedingPostponed switch specifies that the task doesn't seed the database copy, so you need to explicitly seed the database copy.
-TruncationLagTimeThe TruncationLagTime parameter specifies the amount of time that the Microsoft Exchange Replication service waits before truncating log files that have replayed into a copy of the database.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.