Users of Concur's TripLink service have various reasons for participating. At IT consulting firm Sopra Steria, it's about equipping employees. The company partnered last year with InterContinental Hotels Group on an unusual program in which Sopra Steria employees earn bonus IHG loyalty points for enrolling in and booking on IHG's websites with TripLink.

"As a company, we allow our travelers quite a bit of freedom if they want it," said Sopra Steria chief procurement officer and travel and expenses director Andy Hepworth. "Generally, our culture is that people . . .

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