Utilize the input text as a context reference, choose the right relationship between Skype and Microsoft from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Unify Square is recognized as one of the leading partners of Microsoft Skype for Business/Lync, currently impacting day-to-day operations of over 5 million seats at enterprises like Deutsche Telekom and Unilever.

Answer: operator