How to grant permissions to Network Service to write in a remote location

I need to grant permissions to the Network Service account to write on a different machine on the same network. Can you tell me which permissions I should add?
Thanks!

EDIT

From http://technet.microsoft.com/en-us/library/ms143504.aspx

Services that run as the Network Service account access network resources by using the credentials of the computer account

Grant rights to the remote resources to the computer account; this will allow for NETWORK SERVICE to access the resources.

Note that for this to work, the systems must be in a domain.

When granting permissions, Computer accounts aren’t searched by default. You’ll need to change your search scope in the permission granting dialog:

Then select the computer that the NETWORK SERVICE is running as.

Check more discussion of this question.

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