For 2010 I took the following clip that indicates MS does not use zero or letter "o" in product keys:
<snip>
The tool in KB 836178 walks you through a trouble shooting procedure for Office 2010 Product Keys
This behaviour may occur for one or more of the following reasons.:
- A simple fix a couple of people have reported is simply applying all Windows Updates (no idea why it matters … )
- You have a Trial Version of Office installed that is “intercepting” the activation attempt, uninstall it first
- Check the numbers and letters on the product key:
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the number eight (8) can resemble a capitalized B,
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the number zero (0) can resemble a capitalized O or Q
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the number six (6) and letter G
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the letters V V and letter W
- Office 2010 Product Keys do not Contain following Characters:
- Numbers: 00 1 5
- Letters: A E I L N O S U Z
</snip>