replication and home directory available within Windows and Unix

What Ken is getting at is that while you can physically share the same folder to Windows and Unix at the same time, the permissions are separate.  Each file has "extended ACLs" which contain both the Windows permissions and the Unix permissions for each file.  By default, mixed-mode permissions are set to "NATIVE" which means that Windows controls Windows permissions and Unix controls Unix permissions, and ne'er the twain shall meet.  The Windows admin can set the permissions on Windows files, and the Unix admin can set permissions on the same files.

But this presents a problem because a Unix admin can grant permission to a file that a Windows admin may not want granted to that user.   This increases the complexity, for example, if you want the user's home directory, which would be the same in Windows as it is in Unix, to be able to access, and use, the same files on both sides without interrupting each other, or if you wanted one side (either Windows or Unix) to control the access to the files that both sides could see.  This is where the complexity comes in, because you have to get the Usermapper configuration to match the Unix UID/GID format.  NIS actually helps in this environment, as you can then manage both your Windows Celerra access permission and your Unix access permission in the NIS YP, and Celerra will use it.  If  you don't have NIS, you will have to do an export/import process by which you export your Windows user DB in a recognizeable format, and then merge it with your Unix passwd/group files, to make an import file for Usermapper, or to make a static passwd/group file for the Data Mover.  The migration tools (the extraction tool for AD and the merge tool) are available on your Applications and Tools CD, which came with your packaged NAS code software.  The instructions are contained in the manual called "Managing EMC Celerra for a Multiprotocol Environment" which is part of your Documentation CD.  If you don't have the documentation CD, you can download it from Powerlink.  Browse to it through this path:

Home > Support > Technical Documentation and Advisories > Hardware/Platforms Documentation > Celerra Network Server > General Reference

The doc set is roughly the third choice down, and it is called "Celerra Network Server Documentation CD."

As you can see, it gets fairly complex fairly quickly.  I would suggest getting in contact with your EMC field team or your Authorized Service Representative to help you with that configuration.  Some of that config can be done for free, and some of that config is a fee-based engagement.  Check with your field team for more information.