Go to Transaction > Marg on Net > Customer/supplier Setup After That You Will See All 
Ledger of Customer and Supplier and Then Select Ledger Name and Press Enter After That Select
Some Function Whichever Showing
Stock for Re Ordering        ( Stock View Not Allowed, They Can See My Stock, I Can See Their Stock)
Current Scheme                                       (            )  Select (Y) for Yes Other Wise N
Rate & M.r.p  (            ) Select (Y) for Yes Other Wise N   
Show Stock Status   (Available Yes/no, Current Stock)
If My Customer/supplier Is Marg User Then Feed His Detail
User Customer Id  …………………………………….
User Branch Code  ………………………………………….
Feed Password           .....................................   and Then Save.