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Use transaction SALE to maintain ALE distribution model:
After starting the transaction SALE switch into change mode.
Please define one distribution model for one FSM company. 1^st step is the creation of a new model view:

Partner Profiles

For maintenance of partners please use transaction WE20. E4C uses Partner type LS. Please add one partner for one FSM company. Image Modified

Port Definition

Port should be added with transaction WE21: You need one port for one FSM Company.