Washington (CNN) The Bernie Sanders campaign is building its own independent system to report the Iowa caucus results, aides said, because of concerns about Microsoft's influence and questions about how the technology will work.

"Our bigger concern now is rolling out a new technology when we're in the middle of an election," Jeff Weaver, Sanders' campaign manager told CNN on Thursday.

Microsoft has partnered with the Iowa Democratic and Republican Parties to provide technology for both to report their caucus results. Microsoft said Thursday that the results would be accurate and non-partisan.

The Clinton campaign is also building a backup reporting system, MSNBC reports.

"The Iowa Caucuses provided a unique, non-partisan opportunity to use technology to help evolve the reporting process. Microsoft is providing technology and services solely to administer and facilitate a neutral, accurate, efficient reporting system for the caucuses," Microsoft spokeswoman Monica Hopkins said in a statement. "We are proud to partner with the Iowa Democratic and Republican parties to ensure accurate results on caucus night."

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