I did one last search after I sent the email below and found the answer
It is timeZone but needed to be in Linux format of Europe/London
Thanks for your help, as prompt as always ☺
From: SCOTT Jim (AXA-TECH-UK)
Sent: 25 July 2013 16:32
To: 'communities-emailer'
Subject: RE: New message: "CreateCustomizationSpec"
Thanks Luc
Nearly there
The only thing I’m missing now is the Linux Location being set to Area of Europe Location of London
The New/Set OSCustomization states the TimeZone parameter is Windows only, I can create the Linux specification fine but get a default entry of Area Africa and Location Abidjan
How do I set that using the CustomizationSpecManager ?