Exchange & Outlook UPDATE, Exchange Edition--Digging In to Exchange UM, Part 2--May 25, 2006

Subscribe to Windows IT Pro:


Don't miss out! Make sure your copy of Exchange and Outlook UPDATE isn't mistakenly blocked by antispam software. Add [email protected] to your list of allowed senders and contacts.


This email newsletter comes to you free and is supported by the following advertisers, which offer products and services in which you might be interested. Please take a moment to visit these advertisers' Web sites and show your support for Exchange & Outlook UPDATE.

Sherpa Software



1. Commentary
- Digging In to Exchange UM, Part 2

2. Peer to Peer
- Featured Thread: SSL Certificate Vendors
- Exchange Tip: How can I connect Microsoft Exchange Server to another mail system that hosts mailboxes for a certain SMTP namespace?

3. New and Improved
- Integrated Antivirus, Antispam, and Attachment Filtering

==== Sponsor: Sherpa Software ====

Email & PST Archiving (FREE White Paper)

To satisfy corporate, legal or regulatory requirements, organizations need a way to archive their critical data within mailboxes and PSTs and protect it long-term. In this white paper from Sherpa Software, learn how to discover, manage and archive information within your Exchange enterprise.

Topics include: The costs of storage, retaining messages, Exchange's built-in capabilities, message journaling, accessing and archiving PST data and much more.

Sherpa Software's Archive Attender and Mail Attender will help fulfill your archiving, management, and compliance needs. To download this FREE white paper, click on the link below or visit the "free downloads" section of our web site (


Editor's note: Share Your Exchange Discoveries and Get $100
Share your Exchange Server and Outlook discoveries, comments, or problems and solutions for use in the Exchange & Outlook Administrator print newsletter's Reader to Reader column. Email your contributions (500 words or less) to [email protected] We edit submissions for style, grammar, and length. If we print your submission, you'll get $100.


==== 1. Commentary: Digging In to Exchange UM, Part 2 ====
by Paul Robichaux, Exchange Editor, [email protected]

Last week's column on Exchange 2007's unified messaging (UM) feature (“Digging In to Exchange UM” InstantDoc ID 50363) drew a lot of reader email, which is interesting for two reasons. First is that it showed how many unanswered questions people have about how Exchange will implement UM, and second is that it helps prove my suspicion from my column two weeks earlier (“What Do You Do Daily?” InstantDoc ID 50322). You might remember that in that column, I cited a Ferris Research report that claimed that Exchange administrators need better tools for performing daily and weekly maintenance. Then I asked whether anyone out there was actually doing daily or weekly scheduled maintenance on their Exchange servers and, if so, what exactly they were doing. The overwhelming response: the sound of crickets chirping.

Because so many people wrote to ask about Exchange UM, I concluded that the lack of response about scheduled maintenance wasn't because some kind of bizarre worldwide email failure was preventing you from writing to me. Rather, I take it as evidence that there really aren't any significant daily tasks you need to perform on your Exchange servers, apart from the obvious ones, such as checking backup results, that you'd have to do with any backup system.

So, on to answer a few of your questions about UM.

The biggest group of questions concerned whether UM would work with a particular PBX. Last week, I mentioned that some PBX systems natively support the two protocols that Exchange UM uses: the Session Initiation Protocol (SIP; used for call set-up and tear-down) and the Real Time Protocol (RTP; used for moving audio data from the PBX to the UM server). Some PBXs require the use of a separate gateway. If you want to know whether a Brand X PBX can be used with Exchange UM, the answer is "it depends." If your PBX natively supports SIP and RTP over TCP, then it might be supported. (Microsoft hasn't yet released results of its interoperability tests.) If your PBX doesn't support those protocols, then it might be supported if it works a third-party PBX gateway product for Exchange 2007 UM. Both Intel and AudioCodes have such products.

I got a few questions about Asterisk, the popular Linux-based software PBX. I'm a big Asterisk fan, since I have several friends who work for Digium, acompany that provides Asterisk installation support. Unfortunately, you can't use Exchange 2007 UM with Asterisk. Why? Asterisk supports only SIP over UDP, and Exchange supports only SIP over TCP. According to Exchange Technical Product Manager Michael Khalili, Microsoft made the decision to use SIP over TCP for two reasons: security and interoperability. The broad market is clearly moving toward using TCP as the preferred SIP transport. For whatever reason, however, the Asterisk community never quite got around to adding TCP support to its product. Until it does so, you can't use the two together (although you might be able to cobble something together using a SIP gateway product).

As I expected, a few readers wrote to ask about small-business implementations of Exchange and how they might be affected by the UM server role. The Exchange UM role doesn’t have to be installed on its own server, so if you have only one Exchange server now, you can continue to use a single server after you upgrade. Michael told me that the current implementation of the UM server can handle 50 to 100 concurrent telephone calls--closer to 100 if you have a dedicated machine, and fewer if the server is shared with other roles. Microsoft's sizing guidance is thus simple: if you have fewer than 100 calls arriving at a time, you can handle them with a single server; if you have a higher arriving-call volume, you'll probably need multiple servers.

Having a robust, well-integrated UM feature would give Microsoft an outstanding competitive advantage because, as things stand now, full-fledged UM systems that work with Exchange or Lotus Notes tend to be too expensive and complicated for most small-to-midsized businesses (SMBs). Enterprises can afford to deploy Cisco CallManager, Adomo Voice Messaging, or the like, but small organizations often can't afford or support such products. Exchange UM also includes some features, such as the built-in speech recognition engine and the ability to access calendar data over the telephone, that no other competing product has.

Being able to provide voicemail and fax integration at a low incremental cost will help push Exchange 2007 into organizations that want more communication flexibility without having to deploy their own set of Scary Phone Guys. And that's a compelling prospect indeed.


==== Sponsor: ====

Learn how to address challenges such as: making e-mail truly available 24x7x365, securing against viruses, comprehensively backing up e-mail data and more.


==== Events and Resources ====
( A complete Web and live events directory brought to you by Windows IT Pro: )

Consolidate Windows Event Log and Unix Syslog to save money and ensure continuous compliance. Also identify 50 critical events you should be monitoring for! Live Web Seminar: Tuesday, June 6

Win a new iPod (for Mac or PC)
Download a Windows IT Pro podcast on Windows IT Pro Radio by your favorite author, editor, or industry figure. You'll automatically be entered to win!

Industry expert Mike Otey explains how to design high availability options for your SQL Server 2005 environment. He'll also cover Windows clustering, database mirroring, and online operations. Live Event: Wednesday, May 31, 2006; 12:00 EDT

Learn to gather evidence of compliance across multiple systems and link the data to regulatory and framework control objectives. On-demand Web seminar.

Learn all you need to know about code signing technology, including the goals and benefits of code signing, how code signing works, and the underlying cryptographic and security concepts and building blocks.

==== Featured White Papers ====

How much are you spending on IT compliance? Streamline and automate the compliance life cycle with this FREE white paper, and reduce your costs today!

~~~~ Hot Spot ~~~~

Learn the best ways to manage your email security (and fight spam) using a variety of solutions and tips.

==== 2. Peer to Peer ====

What Do You Think? Don't forget to sound off in our Instant Poll. This month's question is What's your top Exchange performance concern?.

Featured Thread: SSL Certificate Vendors
A forum reader writes that his organization might need to purchase a third-party Secure Sockets Layer (SSL) certificate because of problems with mobile phone service providers that don't accept self-generated certificates. He wants opinions about which vendors provide the best service for the lowest cost. Read the other responses and at your own at the following URL:
Exchange Tip: How can I connect Microsoft Exchange Server to another mail system that hosts mailboxes for a certain SMTP namespace?
by John Savill,

Find the answer at

==== Announcements ====
(from Windows IT Pro and its partners)

May Exclusive--Save $100 off the Exchange & Outlook Newsletter
For a limited time, order the Exchange & Outlook Administrator newsletter and SAVE up to $100! You'll get 12 helpful issues loaded with solutions you won't find anywhere else and FREE access to the entire Exchange & Outlook online article database. Subscribe now:

Memorial Day Special--Save 58% off Windows IT Pro
Subscribe to Windows IT Pro today and SAVE 58%! Along with your 12 issues, you'll get FREE access to the entire Windows IT Pro online article archive, which houses more than 9,000 helpful articles. This is a limited-time offer, so order now:

==== 3. New and Improved ==== by Blake Eno, [email protected]

Integrated Antivirus, Antispam, and Attachment Filtering
Sunbelt Software announced the release of its third-generation enterprise messaging security solution, Sunbelt Messaging Ninja. The product provides antivirus, antispam, antiphishing, and attachment filtering in a plug-in framework that allows for future security features to be added easily. Ninja provides a range of predefined reports that can generate information at the system, group, or user level that shows inbound mail messages scanned, number of spam deleted or marked, number of viruses intercepted, and percentage of viruses by name. Pricing for Ninja is on a per-mailbox basis. For more information, contact Sunbelt Software at 727-562-0101 or 888-688-8457.

Tell Us About a Hot Product and Get a T-Shirt! Have you used a product that changed your IT experience by saving you time or easing your daily burden? Tell us about the product, and we'll send you a T-shirt if we write about the product in a future Windows IT Pro What's Hot column. Send your product suggestions with information about how the product has helped you to [email protected]


~~~~ Contact Us ~~~~

About the newsletter -- [email protected] About technical questions -- About product news -- [email protected] About your subscription -- [email protected] About sponsoring UPDATE -- [email protected]


This email newsletter is brought to you by Exchange & Outlook Administrator, the leading publication for IT professionals managing, securing, optimizing, and migrating Exchange and Outlook. Subscribe today!

Manage Your Account
You are subscribed as %%$email%%

You are receiving this email message because you subscribed to this newsletter on our Web site. To unsubscribe, click the unsubscribe link:

View the Windows IT Pro Privacy policy at Windows IT Pro a division of Penton Media Inc. 221 East 29th Street, Loveland, CO 80538, Attention: Customer Service Department Copyright 2006, Penton Media, Inc. All Rights Reserved.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.