Wikipedia
ExtremeZ-IP, an Apple Filing Protocol server from GroupLogic, Inc, (Arlington, Virginia, USA), runs on Windows operating systems enabling Mac clients to access files via the Apple Filing (AFP 3.3) protocol. Starting with version 8.0, the Network Reshare capability allows an ExtremeZ-IP server to proxy access to file shares on a secondary file server or NAS device such as NetApp or Isilon. ExtremeZ-IP also provides access to other Windows services such as printing, searching, file system archiving, distributed file system and volume shadow service.
ExtremeZ-IP supports Macintosh clients running Mac OS 9.2 through Mac OS 10.9 Mavericks.
ExtremeZ-IP (extremez-ip.exe) requires Windows and supports Windows Server 2012, Windows Server 2008 (R2, 32-bit & 64-bit), Windows Storage Server, Windows Home Server, Windows 2003 Server, Windows XP, Windows XP Embedded, or a Windows Powered NAS.
ExtremeZ-IP was the first third party file server to support Time Machine (Apple software) and to support searching via Apple's Network Spotlight (software) that provides indexed content search. This search is accomplished by translating and passing the search query to Microsoft's Windows Search service and passing the results back to the Mac user via a reverse process. ExtremeZ-IP links Macs to Microsoft's Distributed File System (Microsoft) (DFS) and, with the optional ShadowConnect, to Microsoft's Volume Shadow Copy Service (VSS) snapshots.
ExtremeZ-IP version 9.0 added the option to index remote volumes to enable Spotlight searching for Mac users against remote volumes that don't have a local index search capabilities including network attached storage (NAS) from EMC, NetApp, Isilon and StorNext SAN volumes.