I believe its about 10 minutes. However yes, real time sync does not occur with deleted/viewed/filed emails.
Originally Posted by ashworth
There is a 15-20 minute delay in email reconcilation. The BlackBerry Server only scans the users mailbox every 15 to 20 minutes. Emails marked as read in outlook should reconcile to HH. If it is not working you will want to check the version of mapi on the BES and Exchange, and also check permissions on the service account for the BlackBerry Enterprise Server.