We have services running under IIS with pool setup to run under NetworkService identity. If the service required access to a shared folder on a remote server, on previous versions of WinServer we just added the "ServerA$" account to the list of user permission of the share.
Now, in Windows Server 2012 (R2, probably some previous versions as well) the computer account is no longer selectable in the object type window when searching for the user:
(There used to be "Computers" checkbox here)
Now, how do we allow access to a shared folder on ServerB to a process running under NetworkService Identity on ServerA?