SAP Note 25220 - No stock in transit with cross-company purchase orders

Symptom:

When goods issue is posted for a cross-company purchase order (for a delivery with movement type 643), stock in transit is not updated in the receiving plant.

Cause and prerequisites

This procedure was chosen because usually the issuing and receiving companies have to be managed on different computers. In addition, goods receipt in the receiving plant can be posted before goods issue in the issuing plant with this kind of stock transfer, i.e., the corresponding stock in transit would temporarily be negative.

Solution
You can use the reporting function in Purchasing to display the stock quantities in transit.
Starting with release 3.0D, the stock found with cross-company orders in transit is displayed in the stock overview (transaction MMBE) as well as displayed dynamically determined in the plant availability (MB53).

Additional key words

Cross-company stock transport order