Microsoft Exchange and Blackberry Server Specialists

SEMblog

Microsoft Exchange Server and
Blackberry Enterprise Server news, views and fixes.

Usernames Tried During Authenticated User Attack - Updated

Back in June 2009, I blogged on an authenticated user attack on a client's server. http://blog.sembee.co.uk/post/Usernames-Tried-During-Authenticated-User-Attack.aspx As part of that blog post, I included the list of names that were attempted. The same server was attacked again in the last few days, and the list of usernames attempted changed very slightly. I have included the list below. So qua... [More]

Exchange 2010 Database White Space

With Exchange 2007 and older versions, one of the key elements that an Exchange administrator needed to keep an eye on, and caused confusion for newcomers to Exchange was the amount of white space in the database. This is reported as free space in the event viewer via event ID 1221 during the night and is the result of content being removed from the database by the online defrag process. I have w... [More]

RPC Client Access Array

One of the new features with Exchange 2010 is the client access array. When configured correctly, this is quite a useful feature. In my view it is something that should be configured on all Exchange 2010 servers, even on a single server deployment. Background The full explanation of the CAS Array feature is available on Technet, but in short, the reason it was introduced was due to the changes i... [More]

Sent Items Storage for Shared Mailboxes

The default behaviour of Outlook with regards to sent items continues to come up on forums as an issue. By default, when you send an email using the From field via your Send As permissions, the item you have sent goes in to your own Sent Items folder. This is because you sent it, not the person whose mailbox it was sent from. This can be useful from a tracking point of view (who sent the email). ... [More]

After Moving Mailbox, Type is Set to "Linked"

During a recent mass migration from Exchange 2003 to Exchange 2010, I had a large number of mailboxes that appeared on the new server as the type "Linked". Now while you can change the mailbox type between normal, shared and resource, it isn't supported to change it from Linked. The only fix is to disconnect the mailbox from the user and reconnect it. This of course has other consequences if not ... [More]