access denied error (0x80070005) when create a VM on a SMB share

I have three servers.

Server A - Windows 2012 data center with Hyper-V role
Server B - Hyper-V 2012 server
Server C - Windows 2012 data center as SMB server

All servers are in the same domain. Both server A and B are configured for CIFS delegation to Server C. I am using server A's Hyper-V management console to manage the server B's Hyper-V service. A SMB share is created on server C with full access permision for both server A, B and the user which is a domain admin.

Here is the problem I have. When I try to create a VM on the server B via the server A's console and specify the storage on a SMB share on the server C, I get the following error.

[Window Title]
New Virtual Machine Wizard

[Main Instruction]
The server encountered an error while creating t2.

[Content]
The operation failed.

Failed to create external configuration store at '\\server-C\hypervshare\t2': General access denied error. (0x80070005)

[Expanded Information]
The operation failed.

User 'domain\admin' failed to create external configuration store at '\\server-C\hypervshare\t2': General access denied error. (0x80070005)

Any advice is appreciated.