The FSLogix 2201 Public Preview is now available

In the end, our workaround is:

- Schedule a reboot of servers during Maintenance hours

- Run a delprof2 afterwards

That's it really. 

In the end I've built a script that is scheduled on the RD Broker to check the RD Session Hosts during the night (the script is tied to a scheduled task that runs every 30 minutes between 03:00 AM and 05:00 AM) to reboot and cleanup the server whenever no users are connected (or are disconnected for at least 10 minutes). It also does some Client Side Rendering cleanups.

Hope this script might help out some of you people out there:

$Computers = (Get-RDSessionCollection | Get-RDSessionHost).SessionHost
$ScriptFolder = "C:\Scripts"
$LogFolder = "C:\Scripts\Logs"
$MinimumDisconnctedTimeInMinutes = 10

#Creating logoutput and filenames
$LogFile = $LogFolder + "\" + (Get-Date -UFormat "%d-%m-%Y") + " Maintain RDS Nodes.txt"

Function Write-Log
{
	param (
        [Parameter(Mandatory=$True)]
        [array]$LogOutput
	)
	$currentDate = (Get-Date -UFormat "%d-%m-%Y")
	$currentTime = (Get-Date -UFormat "%T")
	$logOutput = $logOutput -join (" ")
	"[$currentDate $currentTime] $logOutput" | Out-File $Logfile -Append
}

# Reboot where possible
Write-Log -LogOutput "Starting stage Reboot"
$rdUserSessions = Get-RdUserSession
$RebootedComputers = @()

Foreach($computer in $Computers)
{
    Write-Log -LogOutput "- Validating $($computer)"

    # Check if the server is online:
    If (Test-Path "\\$($computer)\\c$")
    {
        $noRdSessionBlock = $True
        $rdSessionCount = ($rdUserSessions | Where-Object { $_.HostServer -eq $computer}).Count

        # If there are sessions, see if they are a reason NOT to reboot:
        If ($rdSessionCount -gt 0)
        {
            # Walk through sessions on this computer:
            ForEach($rdUserSession in ($rdUserSessions | Where-Object { $_.HostServer -eq $computer}))
            {
                # Check if the session was active:
                If ($rdUserSession.SessionState -eq "STATE_ACTIVE") 
                { 
                    $noRdSessionBlock = $False 
                }

                # Check if the session is disconncted LESS than it should:
                ElseIf ($rdUserSession.DisconnectTime -gt (Get-Date).AddMinutes(0 - $MinimumDisconnctedTimeInMinutes))
                {
                    $noRdSessionBlock = $False 
                }
            }
        }

        # Check if we're OK to reboot:
        If ( $noRdSessionBlock )
        {
            # Test if the server has been 'up' for at least 16 hours:
            If ((Get-CimInstance -ComputerName $computer -ClassName Win32_OperatingSystem).LastBootUpTime -le (Get-Date).AddHours(-16))
            {
                # Reboot the server:
                Try
                {
                    Restart-Computer -ComputerName $computer -Force -Confirm:$False
                    $RebootedComputers += $computer
                    Write-Log -LogOutput "-> Server is rebooted"
                }
                Catch
                {
                    Write-Log -LogOutput "-> Failed to reboot Server"
                }
            }
            Else { Write-Log -LogOutput "-> Server was recently rebooted already" }
        }
        Else { Write-Log -LogOutput "-> Server still has active or recently disconnected sessions" }
    }
    Else { Write-Log -LogOutput "-> Server is not accessible" }
}

Write-Log -LogOutput "Sleeping 5 minutes to start-up"
Start-Sleep -Seconds 300

# Cleanup old profiles
Write-Log -LogOutput "Starting stage Cleanup"

Foreach($computer in $RebootedComputers)
{
    Write-Log -LogOutput "- Cleaning $($computer)"

    # Prepare request
    $arguments = ""
    $arguments += " /c:\\" + $computer;
    $arguments += " /u /ed:vt.admin* /ed:SVC-NW-PRTGServices";
    $finalcommand = ".\DelProf2.exe" + $arguments
                
    # Run request
    Push-Location $ScriptFolder
    $result = Invoke-Expression $finalcommand 
    Pop-Location
    Write-Log -LogOutput "-> Profiles Cleaned"

    # Also Cleanup the Printer Client Side Rendering:
    Invoke-Command -Computer $computer -ScriptBlock {
        $RegPath = "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider"
        If (Test-Path $RegPath) 
        { 
            Remove-Item $RegPath -Recurse -Force -Confirm:$False
            Restart-Service Spooler -Force
        }
    }
    Write-Log -LogOutput "-> Spooler Cleaned"
}