A federal judge on Friday blocked the Trump administration’s efforts to keep Harvard University from hosting international students, delivering the Ivy League school another victory as it challenges multiple government sanctions amid a battle with the White House.

The order from U.S. District Judge Allison Burroughs in Boston preserves the ability of Harvard to host foreign students while the case is decided.

Harvard sued the Department of Homeland Security in May after the agency withdrew the school’s certification to host foreign students and issue paperwork for their visas. The action would have forced Harvard’s roughly 7,000 foreign students — about a quarter of its total enrollment — to transfer or risk being in the U.S. illegally. New foreign students would have been barred from coming to Harvard.

The university called it illegal retaliation for rejecting the White House’s demands to overhaul Harvard policies around campus protests, admissions, hiring and other issues. Burroughs temporarily halted the action hours after Harvard sued.

Less than two weeks later, in early June, Trump moved to block foreign students from entering the U.S. to attend Harvard, citing a different legal justification. Harvard challenged the move and Burroughs temporarily blocked that effort as well.

The stops and starts of the legal battle have unsettled current students and left others around the world waiting to find out whether they will be able to attend America’s oldest and wealthiest university.

The Trump administration’s efforts to stop Harvard from enrolling international students have created an environment of “profound fear, concern, and confusion,” the university said in a court filing. Countless international students have asked about transferring from the university, Harvard immigration services director Maureen Martin said.

Trump has been warring with Harvard for months after it rejected a series of government demands meant to address conservative complaints that the school has become too liberal and has tolerated anti-Jewish harassment.