I did a bunch of research, but no answers.
This is a new Exchange 2010 Server. Previous mail server was Kerio on Mac OS. Clients have had Outlook 2010 on both Kerio and Exchange. I created new Outlook 2010 profiles for Exchange accounts, and brought over autocomplete file from old profile. Each and every Outlook 2010 client now has properly operating autocomplete in their Exchange profile.
To confirm that the autocomplete had been stored in the users mailbox, I setup a users profile on another computer and confirmed by sending a new email that the entire users' autocomplete was there. That would mean that the users' autocomplete had been stored in their mailbox.
However, when using OWA, logged in as that user (or any user), there is NO autocomplete.
What could the problem be?
Also, if autocomplete is stored in the users' mailbox, why is there an autocomplete stream file in the roaming cache folder? Which is actually used by the Outlook client? Both?