My MSDN license expired. I logged into Microsoft, deleted all my old MSDN licenses from my account, and added a new invitation from my IT department. I also installed the VS2013 Update3 installer and rebooted my machine.
At this point, Visual Studio shows me as being licensed (no temporary extension, just fully licensed) and I can build C# projects fine. But whenever I try to link a C++ program I get the error:
Exception: License 114440 License expired 2014-10-22
error MSB6006: "link.exe" exited with code 1.
I also tried giving VS the product key from the MSDN page, but behavior is the same.
How can I mollify it?
Visual Studio was not to blame! I had installed a trial version of the Bullseye C++ code coverage tool, which supplies its own version of the CL and LINK tools. These are what had expired. I first noticed that CL and LINK worked fine in the VS2013 native tools shell, and then I went back and found that I still had the Bullseye plugin enabled in Visual Studio itself.
Oops.