How to take backup of User Lync Contact list of all user homed on pool In Lync 2010 and then restore the contact of all users homed on pool

How to take backup of User Lync Contact list of all user homed on pool In Lync 2010 and then restore the contact of all users homed on pool

PS C:\Program Files\Common Files\Microsoft Lync Server 2010\Support> .\DBImpExp.
exe /sqlserver:"lchlncdbl01.labbsci.labbossci.com\lab" /hrxmlfile:"C:\absabhi.zi
p"
SQL Schema Version: 59
User Data Schema Version : 21
Exporting 30 Homed Resource(s) from database...
100% complete.
Exporting 1 Conference Directory(s) from database...
100% complete.
Export completed successfully.

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PS C:\Program Files\Common Files\Microsoft Lync Server 2010\Support> .\DBImpExp
exe /import /sqlserver:"lchlncdbl01.labbsci.labbossci.com\lab" /hrxmlfile:"C:\a
sabhi.zip"  /restype:user
SQL Schema Version: 59
User Data Schema Version : 21
Importing Homed Resources into database...
30 Resource(s) imported.
Import completed successfully.
Reindexing all tables and updating statistics.
PS C:\Program Files\Common Files\Microsoft Lync Server 2010\Support>