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WIndows Server 2012 UNC path issue MVMC tool

Posted on 2016-10-08
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Last Modified: 2016-10-14
I'm converting over a VM host to 2012 Windows Hyperv server (type 1).  I built it, ran all the latest updates and now I'm trying the Microsoft Virtual Machine Converter (MVMC).  When I get to the point of (Specify a Path to store converted hard disk) I get a network error; same error as it would show if I didn't have permissions to the root c or other partitions (i.e. c$, d$ etc) however I am using the domain admin login as a test and it won't let me in.  

The hyperv server is on the domain, I tried to rejoin it and it said already joined and my account is an admin on both the MVMC running server (2012 R2) and the hyperv host.  What am I missing?

The funny thing is that I can see the partitions I built via "edit disk" from the Hyperv manager tool.  AND when you first launch MVMC it accepts my login to connect to the hyperv host... Strange...
screenshot-mvmc-error.png
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Question by:jo80ge121
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LVL 74

Assisted Solution

by:Jeffrey Kane - TechSoEasy
Jeffrey Kane - TechSoEasy earned 500 total points
ID: 41835418
This is a common issue and is noted in the MVMC Troubleshooting Guide as "Issue number 2"

So the question is -- is the machine you are running MVMC on a member of the domain?  It must be in order for it to succeed.
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Author Comment

by:jo80ge121
ID: 41836071
Yes, I read the same article but it is joined to the domain.  I'm going to rejoin just to make sure.
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Accepted Solution

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jo80ge121 earned 0 total points
ID: 41836259
It turns out that the firewall needed to be edited.  I rebuilt the same setup in another test lab and same issue.  I added the following firewall rule to the Hyperv 2012 server to get it to work, disabling the entire firewall is an options as well but I only focused on 139 and 445

netsh advfirewall firewall add rule name="HyperVsetup" dir=in action=allow protocol=TCP localport=139,445
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LVL 74

Expert Comment

by:Jeffrey Kane - TechSoEasy
ID: 41836734
Glad you got it worked out.
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Author Closing Comment

by:jo80ge121
ID: 41843344
After investigating a little more I found that the firewall was the issue that didn't allow the converter tool to see the UNC path.  Jeffrey's comment is correct but it was the firewall that cleared up the issue after joining to the domain
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