BlackBerry® Enterprise Server Version 5.0

[davidelkaim]

When i deleted email on my oultook 2010 is not deleted on my device . but if i deleted on my device is deleted on my inbox . when can i do ?  

[knottyrope]

This will explain a lot about reconcile and hard deletes
KB04863 - Permanent deletion of email messages in Microsoft Outlook does not reconcile to the BlackB...

link in above KB in case you missed it
KB04853 - How to enable hard deletes on the BlackBerry Enterprise Server

I have also changed the messages state size to 1000 and it cured 99% of our issues.
The performance hit and RAM increase is almost nil on the BES box.

On Device also double check:

Make sure that Wireless Reconcile is set to On. Sometimes toggling that to off, saving it, then turning it back on.
Messages Options - Email reconciliation -
Delete on Mailbox and handheld,
wireless reconcile = Yes
On conflicts = Mailbox wins.

If still not working and you moved a user mailbox.

KB20770 Email reconciliation does not work after moving a mailbox

Is the user over quota?

How to perform an email reconciliation test

How to verify the wireless email reconciliation process

How email reconciliation works on a BlackBerry smartphone