Tuesday, December 9, 2008

Exchange 2007 Multi Node Single Copy Cluster and Additional MTA Issue

Based on my experience , there is no need for addinational MTA on Exchange 2003 Multi Node Cluster. If you have an MTA resource on first Exchange 2003 node, you don’t need additional MTA resource at other Exchange Nodes.

But If you install multi-node single copy Exchange 2007 Cluster, you have to create additional MTA in Active Directory (by using AdsiEdit) for every additional Exchange 2007 nodes. If you don’t do that you cannot create a mailbox on these Exchange nodes.

You receive the following error in Exchange Management Console: “A proxy generator DLL on server FQDN.serverName could not be found or failed to initialize. Proxy addresses for the current recipient cannot be calculated. Please ensure that all proxy address generator DLLs have been installed on the target server”

Additionally, the following event may be logged:
Event Type: Error Event Source: MSExchangeIS Event Category: General Event ID: 1201 Description: Error -2147221233 reading/decrypting the msExchResponsibleMTAServer attribute on the Server object in the Active Directory. For more information, see Help and Support Center at Data: 0000: 5b 44 49 41 47 5f 43 54 [DIAG_CT 0008: 58 5d 00 00 26 00 00 00 X]..&... 0010: ff f0 0d 00 00 00 00 00 ÿð...... 0018: 00 02 18 00 00 00 cd 4a ......ÍJ 0020: 20 10 00 00 00 00 bd 5f .....½_ 0028: 20 10 00 00 00 00 bd 5f .....½_ 0030: 20 10 00 00 00 00 .....

Move Mailbox operations doesn’t care about additional MTA on every Exchange2007 Server on cluster. You can successfully move mailboxes to these Exchange servers. But these clients cannot logon via Outlook Web Access or MAPI (Outlook).

You can find additional information at http://support.microsoft.com/kb/928811 Microsoft support article.

802.1X NAP and Certificate Issue

At this posting , I want to talk about 802.1x NAP and Certificate related problems. According to my experience , you have to use a certificate from Enterprise CA at Network Policy Server’s certificate. StandAlone CA’s certificate is not working properly at NPS. Another issue about certificate is Client Machine certificate. According to my experience also, you have to use computer certificate and machine authentication at 802.1x NAP. If you don’t use computer certificate and also computer authentication on 802.1x NAP clients, there would be authentication failure at Pre-Logon stage. This problem causes cached logons on client computers, clients wouldn’t get either group policy or password expiration notifications.

Microsoft Office Communications Server 2007 using Direct SIP to Cisco Unified Communications Manager Simultaneous Ringer 7.0(1) Feature

Hi Everyone
This time , I want to talk about OCS 2007 and Cisco Call Manager Integration. Upon my OCS 2007 telephony experience , Cisco Call Manager has only direct integration with OCS . İf you want to remote call control , you need to Cisco Unified Presence Server. But Cisco Unified Communications Manager‘s mobility feature allows you simultaneous ringing (not Dual Forking) , cisco ip phones or Cisco IP Communicators and OCS MOC clients or Microsoft Phone Editions at the same time. You can find related howto solution at
http://www.cisco.com/en/US/solutions/collateral/ns340/ns414/ns728/ns784/716742.pdf. Also you can test this feature at virtual test environment. Because Unified Call Manager 6.x or above can be intalled at WmwareWorkstation or ESX for testing purposes. If you use Dual forking and Remote Call Control you will have "in a call" status even when you are using the phone. It's only Nortel that supports Dual forking and Remote Call Control right now. Here is the Supported IP-PBXs for Microsoft Office Communications Server 2007 link :http://technet.microsoft.com/en-us/office/bb735838.aspx#ippbx2

Friday, December 5, 2008

Vista SP2 Beta and Windows 2008 SP2 Beta Available

Microsoft has released Windows 2008 SP2 Beta with some interesting changes. For me, most important news is that same installer can be used for both Windows 2008 SP2 and Vista SP2. As many of you already know, Windows 2008 was released with SP1 code included. Essentially Windows 2008 RTM and SP1 are the same code. That's why the first downloadable service pack for Windows 2008 is SP2.

If you want to test out the new SP2 Beta, check out the following link:

You can also find the detailed information here:

Tuesday, December 2, 2008

Useless hiberfil.sys file on Windows 2008

Hibernation is disabled by default when you first install Windows 2008. However, a hidden file called hiberfil.sys is created as big as the amount of physical memory on the system partition of the disk (not more than 4 GB). As using hibernation is not reasonable on production servers, you can delete this file and gain space by simply running "powercfg.exe /h off" command without quotations.
There is also a support article http://support.microsoft.com/kb/920730/en-us

Monday, December 1, 2008

Check State & Start Specific Service Script

The below script checks the state of the DHCP Server service and tries to start it if stopped.

Download Script