Exchange 2007 Cannot directly book meetings

Hello all

I am running Exchange 2007 sp2, the mbx and cas\ht are on separate servers,
I have configured all the exchange web services correctly, all users are
running outlook 2007. Autodiscover, availability,oof, and OAB all work
correctly. Currently I still have a public folder store (left over from a
transition from exchange 2003) I no longer need the public folder store and
I am trying to get rid of it, but I cant. When I dismount the public folder
store, users can no longer book meetings, the error message users get is
dismounted, all users can still download the oab, oof works and free\busy
works, so this tells me that the exchange web services are setup correctly,
the only thing that does not works is directly booking meetings.

All resource (room) mailboxes are setup for "autoaccept" and when the public
folder store is mounted and I use outlook to log into one of the room
mailboxes and click the resource scheduling tab, all the boxes are
unchecked, and this is how it should, this is the correct setting for a
exchange 2007 resource mailbox. Now if I dismount the public folder store,
then go back into the resource mailbox, I can no longer click on the
resource scheduling tab, I get a "not implemented" error, (not sure what
that means) so again, I do not know if I am getting this error because the
mailbox databases are still associated with the public folder store, or if
there is something wrong with the resource booking attendant feature? I cant
remove the public fodler store until I understand what is causing this issue
to occure.

Thanks very much for any assistance with this

So, I was able to fix this issue.

So, I was able to fix this issue.

Used adsiedit and deleted the public folder store from the exchange 2003
administrative group, after doing this the public folder database on the
exchange 2007 server would not mount, but I no longer had the issue with
users not being able to book meetings in resource calendars (so this was a
step in the correct direction) I could not remove the public folder store on
the 2007 server, because it was looking for attributes that got removed when
I deleted the 2003 public folder DB  out of AD using adsiedit. I then went
back into adsiedit and then deleted the 2007 public folder database, and
after this when I launched ESM, I no longer saw public folder database it
was gone, however the mailbox databases were now pointing to an object that
was deleted. This whole time free\busy worked and I could directly book
appointments. I then created a new 2007 public folder database and
associated all the mailbox databases with the new public folder database.
After this I followed this KB to remove the system and default public
folders http://technet.microsoft.com/en-us/library/bb201664.aspx once this
was done I removed the public folder database and this removed it from all
the mailbox databases. NO MORE PUBLIC FOLDERS!!!!

thanks for all the help mvp's