Networking

Five tips for handling Exchange 2010 gotchas

If you're planning to migrate to Exchange 2010, you'll want to be aware of several issues. Scott Lowe explains how to deal with some of the biggest concerns.

Exchange 2010 brings a lot to the table, including a better overall Web experience, more flexible availability options, and improved unified messaging features. However, there are a few tricky issues that Exchange administrators should understand before embarking on an upgrade from an earlier version of the software. These tips will help keep things on track.

Note: These tips are based on an entry in our Servers and Storage blog.

1: Determine your needed disk space

In earlier versions of Exchange, disk capacity trumped performance. This meant that organizations needed relatively expensive storage (from a performance perspective) to architect a system that could meet user expectations.

Although the shift to performance trumping capacity began in 2007, Exchange 2010 completes the process by fully eliminating deduplication in the software. This change has significantly reduced Exchange 2010's IOPS needs, but it has created a need for much more storage capacity to be designed into Exchange 2010 systems.

How to mitigate: Plan ahead! Use Microsoft's Exchange 2010 Mailbox Server Role Requirements Calculator as a first step in your planning process to figure out how much disk space you need. Also remember that Exchange 2010's availability mechanism (Database Availability Groups) has a major impact on capacity.

2: Be prepared to forgo support if you go virtual

One of the beauties of the IOPS overhaul in Exchange 2010 is the ease with which Exchange 2010 lends itself to being virtualized. Virtualization of Exchange brings major benefits to the architecture, including heretofore unseen availability options and cost reductions. But there is a catch: If you're planning to deploy Exchange 2010's unified messaging role, you can't get to the 100% virtual panacea and expect to receive support from Microsoft. The company still does not support the unified messaging role in a virtual environment, including the role running directly on a Hyper-V root.

How to mitigate: You have two options: 1) Go virtual and go without support or 2) Deploy the unified messaging role to dedicated virtual hardware.

3: Find a faxing system

If you deployed Exchange 2007 and use its inbound faxing capability, you'll be disappointed to learn that Microsoft has eliminated the feature in Exchange 2010.

How to mitigate: Buy a third-party faxing system that integrates with Exchange 2010. Take a look at the Fax Partners section of this page for assistance in identifying a vendor.

4: Find a remote access strategy

Exchange 2007's Outlook Web access introduced what I considered a fantastic feature: The ability to access Windows file shares and SharePoint document libraries from within the Outlook Web Access client. With that feature, telecommuters or users who were on the road could access files they didn't take with them and could potentially work more effectively. But this feature is not included in Exchange 2010. Curiously, some of the supporting PowerShell commands are still available, so there's hope that it may return in a service pack, but I do miss it.

How to mitigate: Consider any number of other remote access strategies, including VPN, DirectAccess, RDP, and Logmein.com. SharePoint document libraries can also be accessed over the Web.

5: Watch out for related licensing requirements

If you're interested in reading something truly convoluted, pick up a copy of Microsoft's licensing guides. Microsoft licensing can be confusing even for people who have been working with it for years. During an upgrade from an older version of Exchange to a newer version, you might be surprised to learn that you'll be making a number of licensing investments, including:

  • Exchange 2010 Server license -- either Standard or Enterprise
  • Exchange 2010 Client Access License (CAL) -- either Standard or Enterprise
  • Windows Server 2008/R2 CAL

If you're upgrading your Exchange 2007 environment to Exchange 2010, you also need to make sure that you obtain an adequate number of Windows 2008 Server CALs. Remember, each Exchange user will be accessing the Windows server on which Exchange is installed, so these licensing are a must.

How to mitigate: Read and make sure you understand Microsoft's On-Premise Licensing for Exchange Server 2010. Unfortunately, if you're intent on using Exchange 2010, you don't have much choice on the licensing. At Westminster College, we use a Microsoft Campus Agreement licensing contract to simplify the morass that is Microsoft licensing.

About

Since 1994, Scott Lowe has been providing technology solutions to a variety of organizations. After spending 10 years in multiple CIO roles, Scott is now an independent consultant, blogger, author, owner of The 1610 Group, and a Senior IT Executive w...

4 comments
Spitfire_Sysop
Spitfire_Sysop

I feel like Exchange is more trouble than it is worth. If you need to host an e-mail server Linux software does everything you need for free. E-mail does not need to be fancy, it needs to work. Why would you pay more money for a product that ends up being a time sink?

mrpekarik
mrpekarik

You'll more than likely need to upgrade all your Outlook clients to at lease 2007. We've seen issues with free/busy time not visble in Exchange 2010 with the older existing clients.

Edward123123
Edward123123

I would have to say, go with something with support. Sure, any Linux Distro you run has plenty of end user support. However, it's nothing like the support you get some a house like Microsoft. I may not be the biggest fan of the cost of their end user software, but you can't argue that they have come a LONG way in the past 10 years in terms of their server architecture.

TexasJetter
TexasJetter

If I understand correctly, your Exchange CAL no longer includes the right to run Outlook, you must purchase it separately or as part of your Office suite. This may not be a big deal to some, but it does represent a major change in licensing.

Editor's Picks