If you were a Blackberry Internet Service (BIS) subscriber and moved to Blackberry Enterprise Service (BES) and now receiving duplicate emails in your messages. Follow these steps to check
1. Make sure there is no forwarding setup under your BIS to your company email account. Login into your carrier blackberry website to check.
2. If there is a BIS email account setup for your company email then simply delete it.
a. You can also go under Setup
b. Personal Email setup
c. Select the email account and delete it.
3. Delete the service books - follow steps below
a. Options
b. Advance Options
c. Service books
d. Look for abc.def@xyz.com (CICAL) and abc.def@xyz.com (CMIME) service books
e. Select one of them and check UID# - it should start with BISExxxxxx. This will confirm that your company email is setup via BIS and not BES.
f. Press Esc key and go back to where all the service books are.
g. Delete both CICAL and CMIME service books associated with your company email account.
h. Escape out of the options menu
i. Send test emails to make sure that you are not receiving duplicate emails
Note: On some blackberry units you may not be able to delete personal email account. Please contact your carrier tech support to get this accomplished.