When using the System Center Virtual Machine Manager (SCVMM) 2008 R2 console to share an ISO file, the following error may occur:
Error (12700) VMM cannot complete the Hyper-V operation on the %ServerName; server because of the error: User Account does not have sufficient privilege to open attachment (path to ISO file) Error: 'General access denied error' (0x80070005). (Unknown error (0x8001))
Recommended Action Resolve the issue in Hyper-V and then try the operation again.
This issue may occur if the Hyper-V host was unable to read the attributes associated with the SCVMM service account in Active Directory.
For the latest information on how to troubleshoot and resolve this issue please see the following Knowledge Base article:
KB2285882 - Access denied error when configuring shared ISO feature on a VM using System Center Virtual Machine Manager 2008
J.C. Hornbeck | System Center Knowledge Engineer
I've followed the steps in the knowledge base article, yet I'm still experiencing the same error about the user account not having sufficient privilege to open attachment.