DNS timeout/no internet connection from Azure VM

Hi !

I struggle with an internet connection problem on one of my Azure VM.

A couple of days ago I created an ExtraSmall Azure VM from the Windows Server 2012 catalog image. From this VM I am not able to access internet since all the DNS request time out.
Obvsiously I have already tested doing ipconfig /release + ipconfig /renew, launching the troubleshouter and rebooting but without any success...
Please find bellow the results of nslookup and DNS configuration.

I then create another independant Small Azure VM from the same catalog image and it works !!

I want to keep my first VM since I already prepared it to our production environment.
Could you please help me to resolve this annoying issue !

• Get-WMIObject Win32_NetworkAdapterConfiguration | ForEach-Object{$_.DNSDomain}
  7d7092f3f4e444a4acef0a85bd37461d.topsysfed1.3177451923.europewest.internal.cloudapp.net
  
• nslookup internal.cloudapp.net
  

DNS request timed out.
    timeout was 2 seconds.
Server:  UnKnown
Address:  10.140.28.140
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out

• nslookup microsoft.com
  

DNS request timed out.
    timeout was 2 seconds.
Server:  UnKnown
Address:  10.140.28.140
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out

• ipconfig /all
  

Windows IP Configuration

   Host Name . . . . . . . . . . . . : FED1
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Peer-Peer
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : 7d7092f3f4e444a4acef0a85bd37461d.topsysfe
d1.3177451923.europewest.internal.cloudapp.net

Ethernet adapter Ethernet 2:

   Connection-specific DNS Suffix  . : 7d7092f3f4e444a4acef0a85bd37461d.topsysfe
d1.3177451923.europewest.internal.cloudapp.net
   Description . . . . . . . . . . . : Microsoft Hyper-V Network Adapter #2
   Physical Address. . . . . . . . . : 00-15-5D-49-6D-91
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::d4bf:7a0:b67b:af87%13(Preferred)
   IPv4 Address. . . . . . . . . . . : 10.140.28.41(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.254.0
   Lease Obtained. . . . . . . . . . : Friday, June 7, 2013 11:10:15 AM
   Lease Expires . . . . . . . . . . : Monday, July 14, 2149 6:34:54 PM
   Default Gateway . . . . . . . . . : fe80::a64c:11ff:fe2b:a53c%13
                                       10.140.28.1
   DHCP Server . . . . . . . . . . . : 10.140.0.146
   DNS Servers . . . . . . . . . . . : 10.140.28.140
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.7d7092f3f4e444a4acef0a85bd37461d.topsysfed1.3177451923.eur
opewest.internal.cloudapp.net:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 7d7092f3f4e444a4acef0a85bd37461d.topsysfe
d1.3177451923.europewest.internal.cloudapp.net
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Thank you in advance, 

Guillaume

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Guim