How to count unique values?

Hi I want to tell only unique values, 
I explain I would like clients to have open orders within a date, example:

SalesTable
CustAccount         SalesID             Date
    089               S20              01-06-18
    089               S21              01-06-18
    110               S22              01-06-18
    123               S23              01-06-18
    234               S24              01-06-18
    123               S25              02-06-18

The client recovered twice on the date 01-06-18 but 
I want to have reported a single record, 
because it is a single client that has 2 open orders. 
It would be something like that in ssrs report:

date from 01-06-18 to 01-06-18
client         active             orders 
  089            1                  2
  110            1                  1
  123            1                  1
  234            1                  1
 and if I look for date 01-06-18 to 02-06-18 
It would be something like this:

client         active              orders
  089            1                   2
  110            1                   1
  123            1                   2 
  234            1                   1
 If you understand me? I want to count the group of the account, 
that counts unique values ​​please