ExchangeMaintenanceMode.ps1

#WIP in progress as of 2022-01-12

function Start-ExchangeMaintenance {
    [CmdletBinding()]
    param
    (
        [parameter(Mandatory = $true)]
        [validateNotNullOrEmpty()]
        [String]$MaintenanceServer,
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [String]$failoverServerFQDN
    )
    
    begin {
        function Test-ElevationStatus {
            $id = [System.Security.Principal.WindowsIdentity]::GetCurrent()
            $p = New-Object System.Security.Principal.WindowsPrincipal($id)
            if ($p.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator))
            { Write-Output $true }      
            else
            { Write-Output $false }   
        }

        if ((Test-ElevationStatus) -ne $true) {
            Write-Warning "Not admin, exiting.."
            break
        }

        $failoverServer = ($failoverServerFQDN).split('.')[0]

        $clusterstatus = get-clusternode

        if (($clusterstatus | where-object {$_.Name -eq $failoverserver}).State -ne "Up" ) {
            Write-Warning "Abort, $failoverserver is paused as a cluster node. Are you sure it´s not in maintenance mode?"
            $clusterstatus
            Return
        }
    }
    
    process {

        Set-ServerComponentState $MaintenanceServer -Component HubTransport -State Draining -Requester Maintenance
        Restart-Service MSExchangeTransport

        Push-Location $exscripts
        .\StartDagServerMaintenance.ps1 -ServerName $MaintenanceServer -MoveComment Maintenance -PauseClusterNode
        Pop-Location

        Redirect-Message -Server $MaintenanceServer -Target $FailoverServerFQDN
        Set-ServerComponentState $MaintenanceServer -Component ServerWideOffline -State Inactive -Requester Maintenance

        #To verify the server has been placed into maintenance mode, confirm that only Monitoring and RecoveryActionsEnabled are in an Active state
        Write-Host "Only Monitoring and ReRecoveryActionsEnabled should be active"
        Get-ServerComponentState $MaintenanceServer  | Format-Table Component,State -Autosize

        #To verify the server is not hosting any active database copies, status skall vara blocked
        Write-Host "Below status should be Blocked"
        Get-MailboxServer $MaintenanceServer | Format-List DatabaseCopyAutoActivationPolicy

        #To verify that the failover server can activate the mailboxdatabases, status skall vara Unrestricted
        Write-Host "The Failover servers status should be Unrestricted"
        Get-MailboxServer $FailoverServer | Format-List DatabaseCopyAutoActivationPolicy

    }
    
    end {
        
    }
}



function Stop-ExchangeMaintenanceMode {
    [CmdletBinding()]
    param (
        [parameter(Mandatory = $true)]
        [validateNotNullOrEmpty()]
        [String]$ServerName
    )
    
    begin {

        function Test-ElevationStatus {
            $id = [System.Security.Principal.WindowsIdentity]::GetCurrent()
            $p = New-Object System.Security.Principal.WindowsPrincipal($id)
            if ($p.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator))
            { Write-Output $true }      
            else
            { Write-Output $false }   
        }

        if ((Test-ElevationStatus) -ne $true) {
            Write-Warning "Not admin, exiting.."
            break
        }
    }
    
    process {
        #configure the server as out of maintenance mode and ready to accept client connections
        Set-ServerComponentState $ServerName -Component ServerWideOffline -State Active -Requester Maintenance

        #To execute the StopDagServerMaintenance.ps1 script
        Push-Location $ExScripts
        .\StopDagServerMaintenance.ps1 -serverName $ServerName
        Pop-Location

        #enable the transport queues to resume accepting and processing messages
        Set-ServerComponentState $ServerName -Component HubTransport -State Active -Requester Maintenance

        #resume transport activity
        #Invoke-command används om du inte jobbar lokalt på $servername
        #Invoke-Command -ComputerName $servername -ScriptBlock {Restart-Service MSExchangeTransport}
        #Kör kommandot direkt om du är inloggad på $servername lokalt
        Restart-Service MSExchangeTransport

        #verify the server is not in maintenance mode, ForwardSyncDaemon och ProvisioningRps kan vara Inactive
        Write-Host "Only ForwardSyncDaemon and ProvisioningRps should be Inactive"
        Get-ServerComponentState $ServerName | Format-Table Component,State -Autosize

        #Balansera om aktiveringspreferens (endast om nya databaser eller servrar lagts till)
        #.\RedistributeActiveDatabases.ps1 -DagName EX2019DAG01 -BalanceActivationPreferences -Confirm:$false
        #Aktivera databaser på respektive server enligt Aktiveringspreferens

        Push-Location $ExScripts
        .\RedistributeActiveDatabases.ps1 -DagName EX2019DAG01 -BalanceDbsByActivationPreference -Confirm:$False
        Pop-Location
    }
    
    end {
        
    }
}