403 Forbidden Error on Inbound Web Service Call

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Hi XI Gurus.

We have been using an ID for a while now to login to the XI server to post SOAP messages to the adapter. For some unknown reason we now receive 403 Forbidden messages. The user has the exact same roles and authorizations as the corresponding user in another environment where this works fine. I know it's not related to any of the solutions posted here because using my ID works fine.

We have assigned the user SAP_XI_APPL_SERV_USER and S_RFC auth's for a few RFC groups that the interface will need to invoke. Again, this works perfectly in our other environment.

A few questions:

1) How can we see the error logs when this error gets thrown? J2EE Admin?

2) What would cause this? It doesn't seem to be authorizations at the XI level. Is it something at the J2EE level?