The 20-year-old initially joined the National League side on a one-month deal in August.
However, having made eight appearances, it has been decided by all parties that Lee will now remain at Park View Road until early 2016.
Orient also confirmed that they have a 24-hour recall option as part of the agreement.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Birmingham CityBirmingham | 26 | 18 | 6 | 2 | 44 | 18 | 26 | 60 |
| 2 | Wycombe WanderersWycombe | 28 | 17 | 7 | 4 | 54 | 29 | 25 | 58 |
| 3 | Wrexham | 28 | 15 | 7 | 6 | 41 | 24 | 17 | 52 |
| 4 | Huddersfield TownHuddersfield | 27 | 14 | 6 | 7 | 39 | 23 | 16 | 48 |
| 5 | Stockport CountyStockport | 28 | 13 | 8 | 7 | 43 | 28 | 15 | 47 |
| 6 | Leyton Orient | 27 | 13 | 5 | 9 | 40 | 24 | 16 | 44 |
| 7 | Bolton WanderersBolton | 28 | 13 | 5 | 10 | 43 | 42 | 1 | 44 |
| 8 | Charlton AthleticCharlton | 27 | 12 | 7 | 8 | 34 | 26 | 8 | 43 |
| 9 | Barnsley | 28 | 12 | 6 | 10 | 41 | 39 | 2 | 42 |
| 10 | Reading | 27 | 12 | 5 | 10 | 42 | 41 | 1 | 41 |
| 11 | Lincoln CityLincoln | 28 | 10 | 8 | 10 | 34 | 33 | 1 | 38 |
| 12 | Mansfield TownMansfield | 26 | 11 | 4 | 11 | 34 | 32 | 2 | 37 |
| 13 | Blackpool | 27 | 9 | 10 | 8 | 39 | 38 | 1 | 37 |
| 14 | Rotherham UnitedRotherham | 27 | 10 | 7 | 10 | 32 | 31 | 1 | 37 |
| 15 | Stevenage | 26 | 10 | 7 | 9 | 23 | 24 | -1 | 37 |
| 16 | Wigan AthleticWigan | 27 | 9 | 6 | 12 | 26 | 27 | -1 | 33 |
| 17 | Exeter CityExeter | 28 | 9 | 5 | 14 | 32 | 42 | -10 | 32 |
| 18 | Peterborough UnitedPeterborough | 28 | 8 | 6 | 14 | 44 | 52 | -8 | 30 |
| 19 | Bristol Rovers | 27 | 8 | 4 | 15 | 25 | 43 | -18 | 28 |
| 20 | Northampton TownNorthampton | 28 | 6 | 9 | 13 | 25 | 43 | -18 | 27 |
| 21 | Burton Albion | 28 | 5 | 9 | 14 | 30 | 44 | -14 | 24 |
| 22 | Crawley TownCrawley | 26 | 6 | 6 | 14 | 26 | 46 | -20 | 24 |
| 23 | Cambridge UnitedCambridge | 27 | 5 | 6 | 16 | 28 | 49 | -21 | 21 |
| 24 | Shrewsbury TownShrewsbury | 27 | 5 | 5 | 17 | 26 | 47 | -21 | 20 |
| > League One Full Table | |||||||||
