The Surrey-based group was awarded the contract ahead of five other companies, including the incumbent print management business, through a tender process.
Mark Vincent, business development director at Alderson POS, said the ability to produce the majority of the work in-house would enable the company to "safeguard the consistency of the Microsoft brand across all campaigns".
He added: "Microsoft uses such a vast range of printed collateral and POS material and brand consistency is of the essence, not just across different printed products but also when reprints are concerned."
According to the company, the key factors in securing the contract were "the levels of visibility and added value services" it was able to offer.
Group chairman Peter Alderson said Microsoft required a "very comprehensive solution".
"Alderson Print Group demonstrated that we have the experience and infrastructure to provide Microsoft with a solution that meets their strict requirements while still maintaining high quality and cost control," he added.
Earlier this year, the group installed its third KBA press, a five-colour KBA Rapida 106, and the company is aiming to become a "market leader" in the point-of-sale market.
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