Accordind to
http://support.microsoft.com/kb/970144/en-us
The values for ABHiddenColumns are:
| Title | 1f 00 17 3a |
| Business Phone | 1f 00 08 3a |
| Location | 1f 00 19 3a |
| E-mail Address | 1f 00 fe 39 |
| Company | 1f 00 16 3a |
| Alias | 1f 00 00 3a |
But in Outlook 2013 there is also a "Department" column, Does any body know what is that value?