What is the use of EDPAR table...maintaining External partner and Internal partner nos ..
This table is used to map external partners with SAP specific internal partner numbers.
For instance:- You are receiving Sales Order create IDoc's from an external entity. The external entity may have a Sold-to-Party which is different compared to the one that you have defined in your customer master.
To link these two sold-to-parties you maintain this relationship in EDPAR so that when the IDoc arrives into the SAP system it knows to perform a look-up.
Is it possible to generate IDOC with out maintaining Internal and External table in EDPAR?
Yes it is possible to generate IDoc without using EDPAR.
Where do I find these Internal and External partner nos in IDOC?
It depends on the specific IDoc in question. Perform a where-used-list on EDPAR and you will see various IDoc function modules.
What is the significance of EDPAR table and External and Internal Partner?
Refer Question #1's response
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