Finally available:

BlackBerry Enterprise Server v5.0 Maintenance Release 2 for Microsoft Exchange

BlackBerry Enterprise Server v5.0 Maintenance Release 2 for IBM Lotus Domino

Original posts with information on what is included in these releases.

BlackBerry Enterprise Server v5.0 MR2 for Microsoft Exchange Coming Soon ... - Port3101.org : Your BES Connection

BlackBerry Enterprise Server v5.0 MR2 for Domino Coming Soon ... - Port3101.org : Your BES Connection

BES for Exchange doesn't use the Offline Address Book (OAB) ... but I bet if you're a user in an Exchange shop you use it!

Give this a look see (Copied without permission from Rajith Jose Enchiparambil's Blog ... subscribe to posts): Get-ExchangeServer: How Offline Address Book Works In Exchange 2007…

A clear understanding of how the offline address book works in exchange helps an admin in troubleshooting the related issues. This article explains how oab works in the 2007...

... not really.

Check it out: Preventing Exchange Activesync Direct Push when roaming - Exchange 2007 - Pro-Exchange

Well ... kinda / sorta. With this setting you can force ActiveSync devices to not automatically push data ... but users can still manually sync. No functionality exists like this on BlackBerry, but from the handheld you can go to Options > Mobile Network > Data Services and set the value to Off When Roaming ... which isnt' really a step up on...

Working with BES doesn't preclude you from knowing the underlying infrastructure ... here's one of those pieces of information worth knowing, and a blog worth subscribing to in your RSS / Atom reader.

Copied (without permission from Mr. Smith) from: Mailbox Permissions: Pulling Back the Curtain... - Michael's meanderings...

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Mailbox Permissions: Pulling Back the Curtain...

Let's talk about mailbox permissions. People often...