Query to return separate rows for date range including NULLs

Question

I'm trying to write a query that will return all customers from table 1. Table 1 also provides a start date and an end date that may be different for different customers. Left join with Table 2  provides all matches and NULL if NO matches.
If there is any match at all, I do not get the NULLs for other dates. There should be a match for each date from start to end. How can I write the code so that my return will loop thru each date and provide the match or NULL?

Answer 1

Sorry. I am somewhat new to this and am not sure what you are requesting. I receive a return of all customers with the code below but if customer 1 has a start date of 1/1/15 and a stop date of 1/5/15 and a document exists for 1/1/15 and 1/3/15
I do not receive the rows with NUL for 1/2/15, 1/4/15, and 1/5/15 which is what I'm trying to accomplish. If there is no match at all, I only receive the one row with NULL and I would like to see a row for each date from start to stop.
SELECT  T1.IDNumber,T1.StartDate,T1.StopDate,T3.SignDateTime
FROM
Table1 T1
INNER
JOIN Table2
T2
ON
T1.CustID
= T2.CustID
LEFT
JOIN Table3
T3
ON
T1.CustID
= T3.CustID
WHERE
T1.StartDate
> '2015-01-20 00:00:00.000'
AND
(T3.ReportID
IN ('DOC1',
'DOC2',
'DOC3') OR
T3.ReportID
IS NULL)
AND
T2.YesNo
= 'Y'