We have over 200 Blackberry's, and recently a few have started receiving e-mails very slowly. It can take several hours for an e-mail to arrive on their Blackberry (arrives in Outlook immediately). Usually the user will receive a bunch of messages at once, then will go another extended period without receiving e-mails. Most of our Blackberry's, however, are working fine.
There does not seem to be anything in common with these users -- they are on different Exchange servers, in different parts of the company, and are running different models and software on their Blackberry's.
With one user I wiped her handheld, deleted and recreated her account on the BES, then reactivated her Blackberry. This has seemed to resolve her problem, but I'd like to find an actual solution rather than a "workaround."
I also found a couple articles saying to remove the CDO entries from the registry on the BES, then restart the BES server. I did this (we probably had over 1000 entries), but the same users are still having delays. If I look in the BES Administrator, it will show pending messages, and no contact with the Blackberry for an hour or several hours.
Anyone experienced a similar problem, or have any suggestions?