We have been through various SAP blogs & SAP help docus, & tried to setup OAuth 2.0 settings , but when we are trying to test our APIs(registered OData services) using POSTMAN version 5.5 (Web app) , it is giving us "Unauthorized error 401".
We tried the below links for the configuration of OAuth2.0.
https://wiki.scn.sap.com/wiki/display/Security/OAuth