Field help (BPEACEAUZ) 

The entry of commercial documents or accounting entries is authorized for all business partners, by default.

For a multi-company management, you can set this field to No to disable the entry for the business partner on specific companies.

Particular cases: Prospects
By default, a prospect BP cannot be entered in accounting. If an exception should be made for a prospect for a given company, enter this exception by setting the authorization code to Yes.