WASHINGTON  A Pentagon office responsible for coordinating Defense Department information campaigns overseas has been abolished in an effort by the Obama administration to distance itself from past practices that some military officers called propaganda, senior officials said Wednesday.

Military and civilian critics said the office, the Defense Department office for support to public diplomacy, overstepped its mandate during the final years of the Bush administration by trying to organize information operations that violated Pentagon guidelines for accuracy and transparency.

Pentagon officials said the position of deputy assistant secretary of defense for support to public diplomacy had been eliminated, with the staff members reassigned and the office closed.

Senior Pentagon officials said the decision to close the office was made by Michele A. Flournoy, the new under secretary of defense for policy, and was meant to ensure that global communications efforts by the Defense Department and military would be aligned with the rest of the government.