Mr. Scaroni, the chief executive, did not take part in the call.
Cyprus decided not to take part in the call, a decision that several participants described as troubling and reflecting the wider confusion surrounding the island's predicament.
The White House gave only about an hour's notice that Obama would personally take part in the call, which comes a day ahead of a key Senate vote on the Paycheck Fairness Act.
Senior executives who took part in the call welcomed their remarks.
Ian T. Lowitt, Lehman's former chief financial officer, who took part in the call, has also received a subpoena.
Dominique Strauss-Kahn, the managing director of the International Monetary Fund, took part in the call, in which the Treasury secretary, Timothy F. Geithner, and the Federal Reserve chairman, Ben S. Bernanke, represented the United States.
Further growth is anticipated in the fourth quarter, which has historically been the strongest of the year for photovoltaic installations, according to the industry association and GTM Research, a clean-energy consulting firm that took part in the call.
He also said Organizing for Action wanted to be a counterweight to grass-roots organizations on the right, like the N.R.A., according to people who took part in the call.
Judge Melinda L. Harmon of Federal District Court in Houston supervised a conference call among lawyers for Andersen and lawyers for several of the people and companies with claims or potential claims against it, people who took part in the call said.
As early as today, one partner who had taken part in the call said yesterday, Andersen could announce the layoffs of as many as 7,000 employees, or up to 25percentt of its 28,000 employees in the United States and Canada.
Rather than calming the waters, three people who took part in the call said, Mr. Kerry was pummeled for nearly an hour by campaign aides who asked if Mr. Jordan was becoming a scapegoat for the candidate's shortcomings.
