Microsoft Corp said it has been cooperating with the Washington State Attorney General's Office, which is suing in federal court to stop President Donald Trump's order restricting immigration from several Muslim countries, Reuters reports.

Microsoft said it was providing information about the order's impact "in order to be supportive. And we'd be happy to testify further if needed," spokesman Pete Wootton said in a statement.

Earlier, Amazon and Expedia had declared that they are joining that legal fight.