You need to login to the partner portal, click on knowledgebase, and in the new window, type in the article ID. I tried and it didn't find it suggesting that it doesn't exist. What are you expecting?

Hi Robert Braunlich, please click here to use our Sage City Global Resource site to access the Knowledgebase.  While there, you can search by Title, Key word(s), or Article number.  The above link also gives you access to some really great resources for your product!

Best,
MC

In the new knowledgebase, I think the old 6-character KB article numbers no longer exist - which is very unfortunate as they are referenced in many forum entries. 

Also note that the link above may get (indirectly) to the Download centre, which is not the same as the knowledgebase.