Fixture reversedThe O's will now host Southend United in the Final Third Development League this afternoon.
The match was originally scheduled to take place at Southend, but Orient will now host the fixture at the Matchroom Stadium, with a 1pm kick-off.
Orient are likely to include several first-team players in the line-up including with the likes of Charlie Grainger, Sammy Moore, Blair Turgott and Armand Gnanduillet likely to get minutes, while new signings Nicky Hunt and Shaun Brisley could also feature against the Shrimpers as they look to force their way into the starting XI for Saturday's trip to Portsmouth.
Admission is £5 adults and £3 concessions via the main reception at the Club, while LOFC season tickets holders can attend free of charge.
Updates will from the match will be provided on the Club's official Twitter.