That's the complaint...
Outlook seems to be open when I close it anyway, or at least takes a long
time to remove itself from memory. I've had several messages when I'm
moving or deleting the PST or setting up add-ons saying Outlook is open
(though I've closed it).
I normally find OUTLOOK.EXE running in Task Manager and close it from
there.
Get
http://sunflowerhead.com/software/knockout/ and you can see if it's
still running - and exit it from the tray. Since I quit sharing the contacts
with OE, only stamps.com software causes me problems. Cradling a PDA before
opening outlook and leaving it cradled when you close OL is another cause.
Re Franks comments: I shared contacts off and on during the beta and it's
always worked for me since Beta 2, including using it with an exchange
account. There were some problems creating contacts and groups using the WAB
interface, but they were all fixed in later builds AFAIK. I couldn't repro
them. The only problem I had was switching profiles - I couldn't since
outlook wasn't completely closed because OE needed the contacts.