CmdID

CmdID / PowerShell / Cmdlets / Get

Get-MgReportMailboxUsageMailboxCount

Get the total number of user mailboxes in your organization and how many are active each day of the reporting period. Microsoft Graph PowerShell reference

From the Microsoft Graph PowerShell reference 12 parameters Its page in the reference

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Parameters

12 in the Microsoft Graph PowerShell reference
-BreakWait for .NET debugger to attach
-HeadersOptional headers that will be added to the request.
-HttpPipelineAppendSendAsync Pipeline Steps to be appended to the front of the pipeline
-HttpPipelinePrependSendAsync Pipeline Steps to be prepended to the front of the pipeline
-InputObjectIdentity Parameter To construct, see NOTES section for INPUTOBJECT properties and create a hash table.
-OutFilePath to write output file to
-PassThruReturns true when the command succeeds
-PeriodUsage: period='{period}'
-ProxyThe URI for the proxy server to use
-ProxyCredentialCredentials for a proxy server to use for the remote call
-ProxyUseDefaultCredentialsUse the default credentials for the proxy
-ResponseHeadersVariable, -RHVOptional Response Headers Variable.