Exchange 2003

How to Block Users from Sending Email Outside your Exchange Organisation

We can configure Exchange to prevent users from sending mail to the Internet (and receive mails). The user can only receive e-mail from other Exchange users in the same organization. To set this, follow the following steps:

1. Create a new distribution group (mail-enabled) in Exchange.
2. Add all the users which are not allowed to send mail outside your organisation.
3. Modify (properties) the SMTP connector(s) that are used to send to the internet
4. Under the Delivery Restrictions tab, REJECT MESSAGES FROM, add the distribution group.
5. Start Registry Editor (Regedt32.exe).
6. Locate and click the following registry key:
   HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Resvc/Parameters/
7. On the Edit menu, click Add Value, and then add the following registry value:
   Value Name: CheckConnectorRestrictions
   Data Type: REG_DWORD
   Radix: Hexadecimal
   Value: 1
8. Quit Registry Editor.
9. Restart the Microsoft Exchange Routing Engine service and the Simple Mail Transfer Protocol (SMTP) services for this change to take effect.

Exchange System Manager (ESM) Crashs If Installed Internet Explorer 7 (IE7)

Over Internet you can find a lot of articles talking about one thing - NOT TO INSTALL IE7 on server machines :).
One of the reasons is a crash of Exchange System Manager (ESM).

Exchange System Manager (ESM) crashes when you press F1, or click on the Help menu option.
As result, inside Event Viewer you will see an Event ID 1000.

I really don’t want to recommend you uninstall IE7. The solution for this “issue” is very simple, remove (rename) the PSAPI.DLL from the Exchsrvr\bin subdirectory:

1. Stop the Exchange System Attendant Service
2. Stop the IIS Admin Service
3. Open a Command Prompt rename the PSAPI.DLL in the exchsrvr\bin directory. to PSAPI.DLL.OLD
4. Restart the Exchange and IIS services.
5. Enjoy

“Outlook Anywhere” and problems with IPv6 in Windows Server 2008

It’s not a secret, that IPv6 has some “issues”. When I’ve been in Seattle, at last MVP summit, a lot of IT professionals said that, and all of them recommended to disable IPv6 on Windows 2008 or / and Vista machines. Kevin Reeuwijk from “Innovative Technology Weblog” posted a very good article; Outlook Anywhere is ‘broken’ on IPv6 in Windows Server 2008.
So, if you run Exchange 2007 on Windows Server 2008 and want to use Outlook Anywhere (aka RPC over HTTP) you probably get a problem. It would not work if the RPC-over-HTTP Proxy and the Exchange Mailbox installed on the same Windows 2008 Server.
To make the long story short, simply unselect IPv6 from the properties of your NIC AND (it’s very important) make a changes to the HOSTS file. Simply open up your hosts file and make the following changes:

• Comment out the line “:::1    localhost”
• Add the following two lines:

         <IPv4 address>    <hostname of the computer>
<IPv4 address>    <FQDN of the computer>

This will resolve all queries for your computer’s name to its IPv4 address, effectively disabling the use of IPv6 for self-communication. You can confirm that this works by doing a “telnet localhost 6004″.

Outlook Web Access New Mail Notification for Exchange 2007, Soon

Dean, developer of well know “Outlook Web Access New Mail Notification” for Exchange 2003, recently announced that he started work on an Exchange 2007 version of OWANotify.