Winbind is currently only available for the Linux, Solaris, AIX, and IRIX operating systems, although ports to other operating systems are certainly possible. For such ports to be feasible, we require the C library of the target operating system to support the NSS and PAM systems. This is becoming more common as NSS and PAM gain support among UNIX vendors.

The mappings of Windows NT RIDs to UNIX IDs is not made algorithmically and depends on the order in which unmapped users or groups are seen by Winbind. It may be difficult to recover the mappings of RID to UNIX ID if the file containing this information is corrupted or destroyed.

Currently the Winbind PAM module does not take into account possible workstation and logon time restrictions that may be set for Windows NT users; this is instead up to the PDC to enforce.