[firephreek]

Only if you purchase a monthly subscription. If you buy a one year license, you get a perpetual license and you don't have to sign in when. The monthly based subscription require logging in every 30 days or so, but you can also key in the licensing offline with out signing in.

[bargl]

The same is true of Visual Studio you can apply a license in VS. I just did it in VS 2015. No sign in required.

[ultramancool]

I've got MSDN, can I do this? Necessitating the signin really pissed me off.

[bargl]

If you have a license key then yes.

https://msdn.microsoft.com/en-us/library/gg442061.aspx