ADE Network requirements - License Server Communication Problem: E_ADEPT_DOCUMENT_TYPE_UNKNOWN:

Oh the joy and bliss of DRM'd training material. From my Android I can access the SAP training manual, however, from my work desktop I cannot. ADE is installed, my account activated, I have downloaded a free document (The Adventures of Sherlock Holmes). However, when I try to load the training manual, I get this error:

"Unable to download. Error getting License. License Server Communication Problem: E_ADEPT_DOCUMENT_TYPE_UNKNOWN:"

My theory is that ADE is attempting to access a server through our proxy / web content filter and is being tripped up. I would like to view some log files, understand the network requirements, etc. in order to properly formulate a request to have our network configuration adjusted to permit this content.

ADE Version 1.x had the option to turn on logging (Ctrl-Shift-T, enable logging...) however, in version 3.x, Ctrl-Shift-T does nothing.

Any help is appreciated!