You will need to set the free/busy on each Outlook client to 12 months. 2
months is the default.

Signature
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. Due to
the (insert latest virus name here) virus, all mail sent to my personal
account will be deleted without reading.
After furious head scratching, Birmangirl asked:
| ...When trying to plan meetings with other users and resources, no
| information is currently available when viewing schedules, except for
[quoted text clipped - 4 lines]
| Thanks in advance
| Amanda