Plai,
What is/are the error(s) you are getting?
Also, what type of machine(s) are in the Workgroup you are trying to import?
I just found out that for Windows 2008 Servers and Windows Vista (and later) computers not joined to a domain have UAC (User Account Control) remote restrictions enabled by default. This will not allow RMS/CCS to be able to query those servers properly (or at all) as well as not allow a workgroup machine to be imported into Reporting & Analytics (R&A) as an Asset until UAC remote restrictions are disabled.
As a side note, for machines joined to a domain, UAC is not in effect.
Microsoft reference article: http://technet.microsoft.com/en-us/library/ee844186(v=ws.10).aspx
To disable UAC remote restrictions, on each Windows 2008/Vista/7 machine in the Workgroup you are having problems with, create/import the following DWORD registry key/value:
_____
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
"LocalAccountTokenFilterPolicy"=dword:00000001
_____
A value of 1 = disable UAC remote restrictions
A value of 0 = enable UAC remote restrictions.
Another characteristic of this issue is if you try to do a net use from a remote machine command prompt to connect to a default admin share (C$ for example), you enter the correct credentials of a local account with administrative rights on the Workgroup machine, and receive an error:
System error 5 has occurred.
Access is denied.
Hope this may help depending on what error(s) you are getting.
Aaron Humphries