"When using SCVMM 2008 R2 console to share an ISO file, the following (see pic) error may occur. This issue occur if Hyper-V host was unable to read attributes associated with SCVMM service account in Active Directory," explains Microsoft via KB2285882.
The resolution depends upon already following the steps to properly configure a shared ISO using SCVMM on TechNet How to Enable Shared ISO Images for Hyper-V Virtual Machines in VMM" and instructions should be followed first before implementing steps below:
1. Add Hyper-V hosts to "Windows Authorization Access group".
a. Open Actve Directory Users and Computers
b. Select Built-in container
c. Select Properties of Windows Authorization Access group
d. Select Members tab
e. Add computer object for Hyper-V host to this group