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The IT policy on your BlackBerry prohibits the installation of third-party apps.

Some IT departments permit 3rd party apps but only from an approved list or from an approved server.

In short, you cannot

The 'Messages' icon is a consolidated inbox, which gathers mail from all accounts linked to the device.

While BIS accounts get their own inbox icons, BES mail does not.

BES mail can only go to the 'Messages' icon, along with all BIS mail, PIN/SMS/Browser messages.

Since you're on a BES, it's possible that your BES administrator has set up a peer-to-peer encryption key.

This will only allow you to receive PIN messages from other BlackBerry devices within your organization.

Users outside of your BES environment will not be able to communicate with your device via PIN messaging.

Your device is likely strapped with an IT policy which causes this behavior.

IT policies can be set by your BES admin which force replies to BIS mail to go through your BES account.

Your BES admin can read these replies.

Yes, the BES admin can see what type of equipment you are using.

It's possible to restrict the devices that are supported via a BES so if you try to activate a device that's not supported it might not complete activation

Your 'Folder Redirection' settings are configured to redirect your 'Sent' folder to the handheld.

This is an option you can change if you wish.

• Go into Messages, click track wheel, choose Options.
• Choose Email Settings.
• On the Email Settings screen, click track wheel and choose 'Folder Redirection'.
• Expand your Desktop folder list, and UNCHECK your 'Sent' folder.
• Click track wheel and choose Save.