When working on a Windows 7 machine connected to a proxy network, Lightroom CC 2015.8/Lightroom 6.8 shows 'Map is offline'. The Map module does not connect and it stays offline.
Lightroom CC 2015.8/Lightroom 6.8
To ensure that the Map module works correctly on a proxy network, it is highly recommended that you update Windows 7 to reflect the latest Service Pack 1 provided by Microsoft.
For more information, see Microsoft's support article Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2.