How to find out the date of license conversion (from Standard to Datacenter)?

Question

I had problems with Microsoft licensing and i need to find out, when my servers was converted from Standard to be Datacenter ?
All my servers was standard, now it's Datacenter and i need to know from when it's Datacenter ???

Answer 1

What I really mean is that I have EA with Microsoft and I'm eligible for example 10 Standard and 5 Datacenter.
During Microsoft auditing they found that I have installed 10 Datacenter and 5 Standard, which is not original design, so obviously someone from my team converted 5 servers from Standard to Datacenter.
My question here that I need to know when exactly my servers where converted, so I can know who converted it as this mistake costs my company a lot!
I need to know time and data when my server was converted from Standard to Datacenter edition? May be it's recorded in registry or somewhere i can find using PowerShell or something, the same Idea of finding out Installation date using this command:
"([WMI]'').ConvertToDateTime((Get-WmiObjectWin32_OperatingSystem).InstallDate)"
Ah, that helps me understand, thanks.
If you installed Standard, and then used DISM /Online /Set-Edition.....
http://technet.microsoft.com/en-us/library/jj574204.aspx
this should be logged in the DISM logfile: %windir%\Logs\DISM
https://technet.microsoft.com/en-us/library/ee851579(v=ws.10).aspx
You may also find some details in the Windows event logs (if you still have that history available).
Don
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