Currently some users are experiencing issues that home drive mapping is missing. If you are on EAD/VDI, please log off and log back in again. Otherwise, the solution is to re-mapping the home drive manually.
Below are the links for the instructions for manually remapping home drive:
Windows:
http://it.ubc.ca/services/web-servers-storage/home-drive-storage-service/mapping-or-mounting-your-home-drive-0
Mac OS:
http://it.ubc.ca/services/web-servers-storage/home-drive-storage-service/mapping-or-mounting-your-home-drive-mac-os