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Get-DatabaseAvailabilityGroup

Use the Get-DatabaseAvailabilityGroup cmdlet to obtain a variety of configuration settings, status and other information about a database availability group (DAG). Exchange PowerShell reference

From the Exchange PowerShell reference 3 parameters Its page in the reference

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Parameters

3 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the name of the DAG to query.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-StatusThe Status parameter instructs the command to query Active Directory for additional information and to include real-time status information in the output.