Your original wording made it sound like you keep OEM licenses on hand, and sell those licenses to your customers, who are not using them in an OEM scenario.
This is what you said:
"We sell maybe 5-10 copies of Office a week. So, it makes sense to keep extras on hand.
Most of our SMB business clients use OEM, in our experience."
So it really does sound like you are selling OEM licenses to your SMB customers, who should should either be using retail or getting volume licensing depending upon their situations.
But from your response, it sounds like you are simply using those OEM copies to pre-load onto machines you are selling, which is totally legit. I think maybe it's just a misunderstanding of what you wrote.
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