Adjust realtive weights for hosts in RDS farm using powershell?

Question

Adjust realtive weights for hosts in RDS farm using powershell?

Dustin 0

I've found some information that its not possible to adjust relative weights for Hosts in a RDS Collection anymore. It seem that the .NET-Type behind <RDSessionHostCollectionLoadBalancingInstance[]>] was discontinued with Windows Server 2022.

Is there any proven way how to adjust the weights for hosts in a RDS farm using Powershell?

Thanks in advance!

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Answer 1

Harry Phan 21,825 Independent Advisor

Hello Dustin,

You’re correct! On Windows Server 2022 and newer, the old PowerShell method of adjusting per-host RDS collection weights through RDSessionHostCollectionLoadBalancingInstance[] is no longer a supported or exposed management path. That underlying .NET type/property chain was effectively removed from the usable RDS PowerShell surface, so there is currently no built-in, supported PowerShell command to set custom relative host weights in an RD Session Host collection the way older versions allowed. On current builds, Microsoft still supports changing collection-level load balancing behavior through the standard RDS cmdlets, but not per-host weighting through deprecated internals.

If you need to influence session placement now, the supported options are to drain or restrict individual hosts with Set-RDSessionHost -NewConnectionAllowed, split workloads into separate collections, or redesign broker behavior around collection boundaries instead of host weights. I would strongly avoid relying on old scripts that poke deprecated objects or WMI paths, because they are no longer reliable on Server 2022/2025 and can break after updates.

I hope you find something helpful with this asnwer. Please give it a thump up, or accept it if it's helpful to you.

Harry.

Dustin 0 Reputation points

2026-03-19T15:07:03.41+00:00

Hello Harry,

thank you for taking your time to write this answer!

So do I understand correctly that there currently is no way to change the weighted distribution of connections automatically e.g. based on CPU load? Why are the weights even in the GUI anymore.

Could you also evaluate a bit more on "redesign broker behavior around collection boundaries" what exactly you mean with this since it might be helpful in my case.

Thanks again!
-Dustin
Harry Phan 21,825 Reputation points Independent Advisor

2026-03-19T16:09:50+00:00

Yes, you get it right, Dustin. On Windows Server 2022/2025 there is currently no supported way to automatically adjust per-host RDS connection weights based on CPU load or other live metrics. If the weights still appear in the GUI, they’re essentially a legacy leftover and not something Microsoft still exposes through a supported PowerShell/API path.

And, by saying “redesign around collection boundaries,” I mean using separate RDS collections for different workload types (for example CAD users vs light users) so the broker places users into the right pool instead of trying to weight individual hosts inside one collection. If you need semi-automatic control, the supported approach is to monitor host load externally and use Set-RDSessionHost -NewConnectionAllowed No (or NotUntilReboot) to temporarily drain busy hosts from receiving new sessions. It’s not true weighted balancing anymore, but on Server 2022/2025 it’s the closest supported alternative.

Answer 2

Adjusting per-host load-balancing weights for an RDS session collection is still possible, but not via the -LoadBalancing parameter on Set-RDSessionCollectionConfiguration in Windows Server 2022+, since that parameter’s backing type is no longer available.

A supported way to set host weights is to use the WMI class Win32_TSSessionDirectory and its SetServerWeight method on the RD Connection Broker. This method sets the server weight value used for RD Connection Broker load balancing.

Key details from SetServerWeight:

Class: Win32_TSSessionDirectory
Namespace: Root\CIMv2\TerminalServices
Method: SetServerWeight
Parameter: ServerWeightValue (type uint32, valid range 1–10000)
The weight is relative: if one server is 100 and another is 200, the 200-weight server receives roughly twice as many sessions.

In PowerShell, the pattern is:

# Example pattern (run on the RD Connection Broker)
$tsDir = Get-WmiObject -Namespace 'Root\CIMv2\TerminalServices' -Class 'Win32_TSSessionDirectory'
$tsDir.SetServerWeight(<ServerWeightValue>)

Use a value between 1 and 10000 for <ServerWeightValue> according to how heavily each host should be favored. Repeat on each RD Session Host (or via a script that targets each host) as appropriate for the farm’s configuration.

References:

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Adjust realtive weights for hosts in RDS farm using powershell?

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