Can you please try the solutions given here : http://helpx.adobe.com/x-productkb/policy-pricing/activation-network-i ssues.html
Can you check if some security program or something similar is blocking signing in ? Disable it once and try sigining in, once signing is successful you can enable it back. Another user faced similar issue and solved it. check this : http://forums.adobe.com/message/5775298#5775298#5775298#5775298
Thanks so much for your quick reply.
I uninstalled my antivirus software, this is the only thing I guess that may conflict with InDesign.
However nothing else happened
Do you have any other ideas?
Okay. What else is installed on your machine ? Please restart your machine and try it again. And if not resolved share following logs: PDApplog, oobe log , amt3 logs( present in temp folder- win : %temp% mac: /tmp )
Ok. You are using trial ID or subscription ID to install InDesign ? + Which version of InDesign you are installing ?
For CC version go to https://creative.adobe.com/products/indesign and click on download, it will first download/install creative cloud desktop app on your machine. Creative cloud app will be launched automatically after installation. Login there with your adobe ID, thereafter InDesign installation will start automatically.