WSUS Cleanup

Hello,

I am trying to run the cleanup of WSUS database

https://support.microsoft.com/en-us/help/4490644/complete-guide-to-microsoft-wsus-and-configuration-manager-sup-maint

but I am getting an error:

PS C:\Source Files\SCCM CB Tools\Script> .\Decline-SupersededUpdatesWithExclusionPeriod.ps1 -SkipDecline
cmdlet Decline-SupersededUpdatesWithExclusionPeriod.ps1 at command pipeline position 1
Supply values for the following parameters:
UpdateServer: VRPSCCMSU01
Port: 8531

Connecting to WSUS server VRPSCCMSU01 Port 8531... Failed to connect.
Error: The underlying connection was closed: An unexpected error occurred on a receive.
Please make sure that WSUS Admin Console is installed on this machine

I checked the port 8531 by telnet and it is opened and working.

The WSUS Admin Console is installed on VRPSCCMSU01.

I tried from the Primary Server and also locally on VRPSCCMSU01 itself and got the same error!!!

What else should I check?

Thanks,

Dom

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Security / System Center Configuration Manager Current Branch / SQL