Cannot set Syslog.global.logHost either by GUI or PowerCLI

Every time I try, either in vCenter, vSphere Client connected directly to the host, or with PowerCLI, I get "A general system error occurred: Internal Error" when trying to set Syslog.global.logHost.

vSphere Client to the host gets this error: Call "OptionManager.UpdateValues" for object "ha-adv-options" on ESXi "hostname" failed.

vSphere Client to vCenter gets this error: Call "OptionManager.UpdateValues" for object "EsxHostAdvSettings-143545" on vCenter Server "vcenter" failed.

For PowerCLI, I run this: set-VMHostAdvancedConfiguration -vmhost hostname -Name "Syslog.global.logHost" -Value "splunk"

I've also tried:

set-VMHostAdvancedConfiguration -vmhost hostname -Name Syslog.global.logHost -Value splunk

set-VMHostAdvancedConfiguration -vmhost hostname -Name Syslog.global.logHost -Value udp://splunk:514

all three give this:

Host summary tab shows the Config Issue of "System Logging is not configured on the host", which is why I was trying to ship the logs to my splunk server.  It works fine on our 4.0 & 4.1 ESXi hosts, just not 5.0.

It was a fresh install that I configured.  When I got these errors, I reset the configuration, only configured the VLAN & IP, and still get these errors.

Any ideas?

**EDIT**
I wanted to add that a get works just fine:

PS P:\> get-VMHostAdvancedConfiguration -vmhost hostname -Name "Syslog.global.logHost"

Name                           Value

----                           -----

Syslog.global.logHost

Message was edited by: cougar694u ~added content