Exchange Server

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Exchange 2007 OWA stops working with “reason=0” error

Outlook Web Access on Exchange Server 2007 may stop working after an Update Rollup is applied.  Users who connect to OWA may receive a browser script error or a blank page with a URL of:   https://mail.yourdomain.com/owa/auth/logon.aspx?url=https://mail.yourdomain.com/owa/&reason=0 This problem can be caused by either of these conditions: Cause #1 The Update Rollup was applied while […]

January 30, 2009

Exchange 2007 mailbox users with incorrect language settings

Users may report that their Exchange mailbox displays in an incorrect foreign language in Outlook and Outlook Web Access.  This issue may occur when the Languages attribute of the mailbox is incorrectly set. You can view the language of a mailbox using the Get-Mailbox cmdlet. [PS] C:\>Get-Mailbox -Identity "John Smith" | fl name, languages Name […]

January 19, 2009

This one isn’t iSCSI’s fault

I’m sure Netlimiter is a fine application for throttling your Bittorrent client so you can steal music and movies while still leaving enough bandwidth to watch Youtube clips and IM your friends about what music and movies you’re stealing and which Youtube clips you’re LOLing at. But it does not belong on Exchange servers.  Or […]

January 15, 2009

Avoiding the Apple iTunes Tax

Apple’s recent announcement that the iTunes Music Store is going DRM-free has enjoyed mixed reactions from the public.  Most people are happy that all iTunes music purchased will be DRM-free from the end of Q1 2009, with about 80% being DRM-free now.  Many people (myself included) bought iTunes music prior to (or despite) the availability […]

January 9, 2009

Troubleshooting Exchange Server 2007 Outlook Web Access Logon Failure

From the Microsoft Exchange Team Blog: Despite our attempts at documenting various break/fix scenarios, it can often be frustrating when trying to locate the information you need to resolve an issue as quickly as you would like. I decided to share this information in an attempt to help you resolve the majority of issues that […]

January 1, 2009

Bruce Schneier on Certificate Authorities

“The CA system is broken, but it works because broken systems tend to be better for society, which needs fluidity in the face of complicated social constructs,” Schneier said. “Systems that are broken but work are very common in the real world: Front door locks are surprisingly pickable. Think of faxed signatures, for example. It’s […]

December 31, 2008

How to save yourself from getting fired

I’ve been working on a post about the current economic client and how best to handle it as an IT professional.  I’ve scrapped and re-drafted so many times and it just hasn’t come together in any coherent and useful manner. Today I stumbled across this post on Mashable from a couple of weeks ago and […]

December 24, 2008

Exchange Server 2007 and Directory Harvesting Attacks

Over at AllSpammedUp.com I’ve written an article about protecting Exchange Server 2007 from Directory Harvesting Attacks. In many Exchange Server 2007 environments incoming email is received directly by an internet-facing Hub Transport server. By default the transport server will use recipient lookups to notify the connecting host whether an email address is valid or not. […]

December 10, 2008

Well-designed security systems fail gracefully, SonicWALL does not

To quote Bruce Schneier, “well-designed security systems fail gracefully”.  This means for example when the ISA firewall service fails it closes off network connectivity entirely (ie retains security) instead of opening your entire network up (ie decreases security). This week SonicWALL’s license servers suffered a glitch rendering thousands of customer units useless and leaving the […]

December 6, 2008