How to add a authorization object to a communication user?
Like F_BKPF_BUK, which is used for an authority check.
The required authorization object F_BKPF_BUK needs to be maintained in the authorization tab of the custom communication scenario which should be published locally afterwards.
In general, there is also the possibility to maintain the default authorizations in the service's service binding under the link "Default Authorization Values". When this service would be added to a communication scenario, the AOs maintained in the default authorizations would be automatically added to the scenario.