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Screen sharing not working after 1809 update

February 5, 2019

I found the following registry entry is missing. You will need to run regedit as Administrator to add the entry.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

When you get here, click on Parameters – do not expand list – look for the parameter, MaxUserPort

NOTE: This is not plural – make sure spelling is accurate.

If this is not defined, please add the following:

New DWORD

Enter the name: MaxUserPort

Hit Enter to Accept the name.

Right click on the new entry and select Modify

Select Decimal and enter 5000 as the value.

Hit OK to accept new value and exit the dialog.

(15000 was recommend to test with. Then I reduced to the default in my final implementation. The reference to default value I took from here:

https://support.microsoft.com/en-us/help/196271/when-you-try-to-connect-from-tcp-ports-greater-than-5000-you-receive-t)

Then Reboot your machine and give it a whirl!

Hope this helps!

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