Hello,
No IM stock will not update if you use LU01. LU01 is at warehouse level transaction. You have two choices. Either post IM transaction(ex- unrestricted to Block) and then use LT06/LT05-PCN notice. You can configure that TO should be automatically created from PCN. But if your stock is present in more than one storage type ,i.e. more than one quant exist for the material then automatic TO will not be created. you have to manually create the TO wrt posting change notice and provide the storage type from where you want to remove the stock.
Another choice which I would recommend that, use one step process of posting change using transaction LQ02. i.e. only post WM transaction and IM transaction will be posted automatically in the background. Prerequisite are
(I) define new WM movement type
(2) OLML-----------> WM--------->Interface--------->IM------->define posting change
Instead of using LU01 you can use LQ02 as above.
Regards,
Milind Chaudhari