Raab pointed to India's particular comparative advantage in tech against the backdrop of Prime Minister Narendra Modi's high-profile visit to the US this week during which mega deals were struck.
In a letter to Prime Minister Rishi Sunak published on Twitter, Raab said the inquiry had set a dangerous precedent, but that he would remain supportive of the government.
The review was requested by Raab in November following formal complaints about his behaviour by government officials, and Sunak appointed lawyer Adam Tolley to lead an independent investigation.
Adam Tolley, a barrister at Fountain Court Chambers, will lead the investigation, the terms of reference published by the government said, without saying when it would be completed.
Raab has been replaced by Liz Truss, promoted from her role of International Trade Secretary.
Fighters from the National Resistance Front -- made up of anti-Taliban militia and former Afghan security forces -- are understood to have significant weapon stockpiles in the valley, which lies around 80 kilometres (50 miles) north of Kabul.
Pakistan and the United Kingdom have been closely engaged on the latest developments in Afghanistan.
S Jaishankar arrived in New York on Monday to chair meetings in the UN Security Council on technology and peacekeeping and on counter-terrorism under India’s current presidency of the Council.
Each of the three oxygen generation units the size of 40 foot freight containers produces 500 litres of oxygen per minute, enough for 50 people to use at a time.
The partnership forms part of a wider set of agreements in the pipeline during the visit of External Affairs Minister S Jaishankar, invited by his UK counterpart Dominic Raab as a guest at the multilateral G7 Foreign and Development Ministers meeting this week.
In the wake of Brexit, the UK has been looking at ramping up trade cooperation with leading economies like India. There have been apprehensions that its separation from the European Union without a trade deal could severely cripple its financial markets and may have long-term implications for its economy.
The British foreign secretary will also have official meetings with Environment Minister Prakash Javadekar and Education Minister Ramesh Pokhriyal.
Thousands of farmers are protesting on various borders of Delhi since November 26, seeking repeal of three farm laws enacted in September.
Britain imposed sanctions on 25 Russians and 20 Saudis on Monday as part of post-Brexit measures foreign minister Dominic Raab said were aimed at stopping the laundering of 'blood money'.
Prime Minister Boris Johnson has come under fire from some scientists for easing a lockdown put in place 10 weeks ago, with some saying it was a premature and risky move
"Relaxing any of the measures currently in place would risk damage to both public health and the economy," Raab told reporters.
British foreign minister Dominic Raab is set to announce on Thursday that the lockdown in the country will stay in place until at least May 7, the Times reported.
Raab told a House of Lords committee today that the two sides were "aiming for the October council, but there is some measure of leeway."