Your network contains two Active Directory forests named contoso.com and adatum.com. All of the
domain controllers in both of the forests run Windows Server 2012 R2. The adatum.com domain
contains a file server named Servers.
Adatum.com has a one-way forest trust to contoso.com.
A contoso.com user name User10 attempts to access a shared folder on Servers and receives the
error message shown in the exhibit. (Click the Exhibit button.)

You verify that the Authenticated Users group has Read permissions to the Data folder.
You need to ensure that User10 can read the contents of the Data folder on Server5 in the
adatum.com domain.
What should you do?

A.
Grant the Other Organization group Read permissions to the Data folder.

B.
Modify the list of logon workstations of the contoso\User10 user account.

C.
Enable the Netlogon Service (NP-In) firewall rule on Server5.

D.
Modify the permissions on the Server5 computer object in Active Directory.

Explanation:
* To resolve the issue, I had to open up AD Users and Computers –> enable Advanced Features –>
Select the Computer Object –> Properties –> Security –> Add the Group I want to allow access to
the computer (in this case, DomainA\Domain users) and allow “Allowed to Authenticate”. Once I
did that, everything worked:
* For users in a trusted Windows Server 2008 or Windows Server 2003 domain or forest to be able
to access resources in a trusting Windows Server 2008 or Windows Server 2003 domain or forest
where the trust authentication setting has been set to selective authentication, each user must be
explicitly granted the Allowed to Authenticate permission on the security descriptor of the
computer objects (resource computers) that reside in the trusting domain or forest. Grant the Allowed to Authenticate Permission on Computers in the Trusting Domain or
Forest.
http://technet.microsoft.com/en-us/library/cc816733(v=ws.10).aspx