Sports fans are to find out if they have got a ticket to the London 2012 Olympics, organisers said.
A London 2012 spokesman said: "Those people who have been allocated tickets will receive an email confirming which events they will receive tickets for, on what day and confirming the price.
"Those who were not allocated tickets in the first round will be able to log on from 6am on Friday to begin the second round of sales."
People who applied by post will receive a letter before June 24, when the second round of ticket sales begins.
Of the 1.9 million who applied in the first round of sales, 1.2 million ended up empty-handed. Those who missed out will be given the first opportunity to buy those tickets still available on a first-come first-served basis when the next sales window opens at 6am on June 24.
London 2012 chief executive Paul Deighton said he was "very sorry" so many people had missed out but that he was determined to ensure that by the end of the whole sales process two-thirds of those who had applied would be in possession of a ticket.
Some three million tickets were bought in the first round, and a further 2.3 million will go on sale though 1.7 million of these are for Olympic football matches and 600,000 for other sports.
The final batch of tickets, totalling 1.3 million, will be sold in stages next year.
London 2012 chiefs are aiming to ensure that two-thirds of the 1.9 million people who initially applied for Olympics tickets will eventually secure some.
Deighton has said: "We know a lot of people missed out, we are very sorry about it and we want to fix it as well as we can by the second-round process and subsequent rounds of sales. The sheer level of demand has left more people than we want disappointed."