How to change workgroup on Sharp MX-5001N MFP?

I am the IT admin for a small business and we're trying to get our Sharp MX-5001N MFP to scan to a network drive on a Windows 7 domain using Small Business Server 2011. After meticulously configuring the address book settings and adding the printer to the DNS manually, I've come to the conclusion that the workgroup is causing the problem. When I try to scan to the network using the address book entry that I configured, it says "Scanner cannot access shared folder" or something like that. I've double checked all the folders are shared and the user account that I'm scanning from has administrato

Question by Joel the easily impressed on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.