Need Base64 instead of remoteURL as the result for Assembler Service Merging

I am hitting Assembler Service to Merge 3 Documents through SOAPUI and I am getting the base64 encoded merged document as the result.

But when I hit the same Assembler Service through IHS with a hostname instead of IP, I am getting a remoteURL as the result from Assembler Service which has an address to the DocumentManager,

Any settings that I am missing? I have enabled the FIPS in the AdminUI.

PS: The Adobe LiveCycle is in a SSL environment. Any special settings that I need to do for such a request to the Assembler Service?