Fixed the issue, just posting a solution and a follow up:
I went into work online in Outlook and then right-clicked on each
folder I wanted to synchronise and selected the Permissions tab. I
noticed when doing this that the 'Default' was set to no permission
for access to the folder.
2. So for each folder I wanted sync'ed (Calendar, mail, Contacts and
Sent items) I right-clicked, selected Permissions and then set the
Permissions for the default user to 'Owner'
3. Then, I went into Control panel ---> Mail ---> Email Accounts
--->View/Change Email. Then click on 'Change' and de-select use
Exchange Cached mode. Then click on 'More Settings" and under the
Advanced tab, click on "Offline Folder Settings and then "Disable
4. Now, make sure your outlook offline file is removed (either delete
it or back it up)�usually this is in C:\Docs &
5. Now, restart Outlook and login in ONLINE mode. Once it is all fired
up, logout and make sure that Outlook is no longer running.
6. Next, go back to Control panel ---> Mail ---> Email Accounts
--->View/Change Email. Then click on 'Change' and ENABLE use Exchange
Cached mode. Then click on 'More Settings" and under the Advanced tab,
click on "offline Folder settings" and you should see that the file is
back again and should be newly created.
7. Finally, you will need to log back into Outlook in ONLINE mode and
click on each folder you want Synchronised and then press 'Shift-F9'
(Sync current folder).
8. Once this is done, logout of Outlook, re-login but this time login
under offline mode. You should be offline with a pretty much blank
canvas. Now (finally) select each folder you want to synchronise and
hit "Shift-F9" again, this time, you should get a much longer wait -
and the pop-up box (or right click on the "preparing to
send/receive.." in the bottom right hand of the screen) and you should
see your folder eventually get populated with the offline data�.