Representatives of Fusion GPS must answer a broad array of questions about the opposition research firm’s role in creating, investigating and disseminating the infamous Steele dossier, a federal judge ruled.

U.S. District Court Judge Ursula Ungaro issued the decision Tuesday in a defamation lawsuit a Russian tech executive filed against BuzzFeed News, which published the dossier on Jan. 10, 2017.

The trial is scheduled to begin in Miami in November.

Fusion GPS, which was founded by three former Wall Street Journal reporters, has resisted efforts to provide information about its work on the dossier. The firm has claimed that revealing details about its dossier work would violate its confidentiality clauses with its clients as well as its First Amendment rights to political free speech.

Fusion GPS was hired in April 2016 by the law firm representing the Clinton campaign and DNC to investigate Donald Trump’s links to Russia. Fusion in turn hired Steele, a former British spy with connections to Moscow.

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