Currently Being ModeratedMar 23, 2012 3:11 AM (in response to oversim)
I have the exact same problem.
Previous versions of iTunes works perfectlty with our proxy server but the latest version doesn't. It look like it doesn't work with Windows Authentication anymore. I have to log in the proxy server every first time I try to acces iTunes Store and iTunes Match. If i shut down iTunes and start iTunes again, the popup is back. Even if I disable the iTunes Store in parental control, iTunes is requesting credentials for the proxy server.
I have the latest updates installed of Windows 7 and everything else is working fine.
Currently Being ModeratedMar 23, 2012 6:13 AM (in response to oversim)
We are having the same issue in our environment. Only thing changed is update to iTunes 10.6 . It appears that iTunes is prompting for each item it is downloading. Checking the remember my credentials box does not help because it really is a different item to ask credentials for. Previous versions of iTunes worked fine as well.
Side Note: This is similar to the problem I see with iPads and iOS 5.1. Previous version of iOS worked
Currently Being ModeratedMar 29, 2012 2:33 AM (in response to Markbeek)
I have tested with the latest version 10.6.1.7 and the problem still persists. Problem of the proxy isn't solved yet.
I tested it on Windows 7 32 and 64 bits. All updates of Windows are installed.
Currently Being ModeratedApr 2, 2012 6:41 PM (in response to oversim)
Same for me to. Have a site with itunes on some PCs for iPhone syncing. The users that have updated to 10.6 have issues, the users still on 10.5 are fine. Site has server 2008 SBS, with Web Marshal for filtering. Tried logging into the PC as domain admin, still won't go.
Currently Being ModeratedApr 5, 2012 5:23 AM (in response to oversim)
Same for me too. No 12002 error, but itunes freeze and told me to disconnect/reconnect my apple id
W7 64 bits. Can't use itunes match...
I have tested with the latest version 10.6.1.7
Currently Being ModeratedApr 24, 2012 8:44 AM (in response to oversim)
Ok...here's a workaround for Windows based computers. Not an ideal solution but it works. For those of you on a corporate network, I highly suggest you get this approved before you implement it.
You will need to download and install Cntlm Authentication Proxy. The link is...
Once installed...find the cntlm.ini file located in the c:\Program Files or c:\Program Files(x86) folder and open it with notepad. Modify the following lines to match your network/proxy configuration...
Once you save the cntlm.ini file go to Services and start the Cntlm Authentication Proxy service...or you could simply restart the computer.
The last step is to configure your browser to use the following address as a proxy server...
127.0.0.1 port 3128 (3128 is the default listening port used by cntlm and can be changed in the cntlm.ini file)
As I said, this is not an ideal solution as your network username and password are stored in the cntlm.ini file as clear text and if you ever change your network password you will need to change the cntlm.ini file as well. This is also why I suggest that those of you on corporate networks get approval for this before you install since this is a potential security risk. But this does resolve the proxy authentication pop up issue with iTunes and for anyone attempting to use Dropbox and having similar proxy issues this solution works for Dropbox as well.
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