KB2750149 breaks WS2012 Fail-over Clustering Snap-In (Updated)

Windows Server 2012 RC LogoA quick heads-up on Windows Server 2012, Fail-over Clustering and KB2750149, an update for the .NET 4.5 Framework. This hotfix was released on the January 8th, 2013.

After installation, this hotfix will break the Windows Server 2012 Fail-Over Clustering MMC Snap-In, resulting an error when navigating stating:

A weak event was created and it lives on the wrong object, there is a very high chance this will fail, please review and make changes on your code to prevent the issue.

WS2012FCCapture

Microsoft is currently investigating the issue. Until then,it is advised not to apply KB2750149 on Windows Server 2012 Fail-over Clusters or uninstall it when you are experiencing the issue.

Note that the Windows Server 2012 Fail-over Cluster will keep working, as well as the related PowerShell cmdlets (another reason to start using the shell instead), it’s just that the cluster can’t be properly managed from the MMC.

Regarding Exchange 2013 DAG, which can be build on top of WS2012 Fail-over Clusters, you shouldn’t notice the issue because fiddling around in Fail-over Cluster Manager is a no-no for Exchange DAGs. Nevertheless, I’d recommend following the advisory and not install or uninstall the hotfix until further notice.

More information in this and this topic on the TechNet forums.

Update (23jan2013): Hotfix KB2803748 fixes the MMC crashing issue. It’s available through Windows Update or download it directly from here.

Windows Server 2012 RC Version and Levels

A quick post on the possible schema version and functional levels introduced with the release of Windows Server 2012 RC.

The schema version of a Windows Server 2012 Release Candidate forest is 56 (was 52 in the Windows “8″ Beta). For more information on Active Directory schema versions and how to read this information, consult the AD Schema Versions page here.

Also, the msDS-Behavior-Version attribute of Windows Server 2012 domain controllers is set to 5, which is the same number as the Windows “8″ beta version number. For more information on Active Directory Functional Levels and how to read this information, consult the AD Functional Levels page here.

Windows Server 2012 RC (Update)

A quick heads-up on today’s release of the much-anticipated Windows Server 2012 Release Candidate (Datacenter). The RC build number is 8400 (beta was 8250).

You can download the x64 ISO or VHD through here.

The Windows Server 2012 Release Candidate is available in Chinese (Simplified), Chinese (Traditional), English, French, German, Japanese, Korean, Portuguese (Brazil), Russian, Spanish, Swedish, and Turkish. The VHD is available in English.

Some documentation to get you started:

More documentation related to Windows Server 2012 RC here.

Other related releases:

Note: Like with all pre-release bits: it’s not recommended to use this in your production environment, so use them in a lab or testing environment only.

Windows Server 8 & Consumer Preview Betas (Updated)

A quick heads-up on today’s release of the much-anticipated Windows “8″ beta:

Windows Server “8″ Beta
This is the next release of Windows Server, Windows Server “8″ and is available for x64 architectures only. You can download Windows Server “8″ Beta ISO or VHD here.

Windows Server “8″ RSAT for Windows 8 Consumer Preview
The Remote Server Administration Tools (RSAT) for Windows 8 Consumer Preview enable you to manage Windows Server “8″ Beta from computer running Windows 8 Consumer Preview. You can download the Windows Server “8″ Server Remote Administration Tools for Windows 8 Consumer Preview here.

Windows 8 Consumer Preview
This is the desktop client OS available for x64 and x86 architectures. You can download the Windows 8 Consumer Preview here.

Some (online) documentation which you might find useful:

The Windows “8″ operating systems are available English, French, German, Japanese or Simplified Chinese. Like with all beta bits, it’s not recommended to use this in your production environment so use them in a lab or testing environment only.

Update: From an Exchange perspective, it may be worth mentioning that the Windows 8 Customer Preview contains a simple built-in Mail application supports Autodiscover and the Exchange ActiveSync (EAS) protocol. The client will show up in the “Mobile Phones” list in OWA (they might need to relabel that in the next Rollup). The Mail app in the Customer Preview reports as “DeviceUserAgent : WindowsMail/16.2.3237.0215″. Wiping your Windows 8 client isn’t possible, but the e-mail account with all the related data will be removed instead, which isn’t consistent with the expected “Mobile Devices” behaviour in my opinion. I also wonder what your security officer will think of this when you’re running the Mail app on a Windows 8 tablet, e.g. Slate. Exchange fellow Dave Stork has done some more research including screenshots for your reading pleasure here.

Exchange 2010 SP1 Prerequisites on 2008 R2 SP1

After Exchange 2010 SP1 became publicly available I wrote, apart from the SP1 changes, also on the prerequisites differences, comparing Windows Server 2008 with Windows Server 2008 R2. Note that these prerequisites are additional to the server roles and features required to install Exchange 2010 server roles.

With the recent release of Windows Server 2008 R2 Service Pack 1 a new operating system level was introduced to the spectrum. It would be interesting to see what impact R2 SP1 has on these prerequisites. When we put that Exchange 2010 SP1 prerequisites in a table, comparing them to Windows Server 2008 R2 prerequisites, we get the following:

Component Windows Server
2008 R2
Windows Server
2008 R2 SP1
AD RMS KB979099
.NET Framework 2.0 KB979744

KB977020 (CAS)

.NET Framework 3.5 KB982867
ASP.NET 2.0 KB983440
UCMA (UM) UCMA Runtime 2.0 UCMA Runtime 2.0
Content Filtering

(Hub, Mbx)

Office 2010 Filter Pack Office 2010 Filter Pack

That’s excellent, no hotfixes to install upfront and the required reboot that goes with it. For the suspicious, here’s a what Setup reported missing on a freshly installed Windows Server 2008 R2 SP1 server:

image

So, we can conclude going straight to Windows Server 2008 R2 SP1 with Exchange 2010 SP1 should make the job of deploying Exchange 2010 SP1 easier and save you some time.

Error 0x00f0818 or 0x800b0100 installing Windows Server 2008 R2 SP1

As the guy behing WorkingHardInIT blog pointed out here, there are people experiencing issues when installing Service Pack 1 on Windows 2008 R2 (or Windows 7) related to missing or corrupted files in the WinSXS\Manifests or Servicing\Packages folders. The related error code is 0x00f0818, but from personal experience I can say may also apply when Windows Update produces error code 0x800b0100.

The missing or corrupted files can be viewed by the System-Update-Readiness-Tool which will generate logfiles at %SystemRoot%\Logs\CBS. For example, a failing SP1 installation might produce the following CheckSUR.log (excerpt):

Checking Package Manifests and Catalogs
(f)    CBS MUM Corrupt    0x800F0900    servicing\Packages\Package_1_for_KB2416471~31bf3856ad364e35~amd64~~6.1.1.0.mum        Line 1:
(f)    CBS Catalog Corrupt    0x800B0100    servicing\Packages\Package_1_for_KB2416471~31bf3856ad364e35~amd64~~6.1.1.0.cat
..
Checking Component Store
(f)    CSI Manifest All Zeros    0×00000000    winsxs\Manifests\amd64_wpf-presentationhostdll_31bf3856ad364e35_6.1.7600.16542_none_cc28a17e399280f3.manifest    amd64_wpf-presentationhostdll_31bf3856ad364e35_6.1.7600.16542_none_cc28a17e399280f3
..

The blog mentioned gives a nice writeup on how to solve this issue by (temporarily) fixing ACLs and then replacing the files mentioned in CheckSUR.log by copying them off a second – identical – installation. But this may get clumsy when the section “Unavailable repair files” mentions a lot of Manifests and Packages, and prone to error with these long filenames.

Fortunately, we can automate this process a bit as I’ll describe below. Before doing this, follow the steps contained in the mentioned blog to set up permissions correctly (don’t forget to reverse changes afterwards). Note that in this procedure I’m going to use a drive letter X: for storing the repair files.

First, copy the CheckSUR.log to a file named files.txt. Edit files.txt and remove the line “Unavailable repair files:” and everything before that. Save the file.

Then, open an command prompt on the system we’re going to copy these files off and enter the following:
for /f %f in (files.txt) do @copy %SystemRoot%\%f X:\%f /y

Next, on the system with issues, open an elevated command prompt and enter the following to make backup copies of the corrupt files:
for /f %f in (files) do @move %SystemRoot%\%f %SystemRoot%\%f.bak /y

Finally, enter the following command to replace the missing or corrupt files:
for /f %f in (files) do @copy X:\%f %SystemRoot%\%f /y

Of course, this procedure can be adjusted to your liking; you could for example copy the repair files directly off another system using the system share.

Windows Server 2008 R2 SP1 RTM’ed

Service Pack 1 for Windows Server 2008 R2 (and Windows 7) being released to manufacturing (RTM) today.  This is great news after an extensive beta period. Organizations can now plan for SP1 deployments. With SP1, organizations can use new features like Dynamic Memory, for increased virtual machine density, and RemoteFX for an enhanced Remote Desktop experience.

The availability of Service Pack 1 may also encourage customers with “SP0 anxiety” to start implementing Windows Server 2008 R2 or Windows 7.

Availability of SP1 is scheduled as follows:

  • February 16:  Available to TechNet/MSDN subscribers and Volume Licensing customers;
  • February 22:  General availability through Download Center and Windows Update.

Update: The Exchange Team blog published an item stating Windows Server 2008 R2 SP1 support for:

  • Exchange 2007 SP3
  • Exchange 2010 RTM
  • Exchange 2010 SP1

So, unlike earlier rumors, you don’t need to wait for Exchange 2010 SP2. What this means for the list of hotfix prerequisites remains to be seen. Note that the Exchange 2010 Supportability Matrix doesn’t mention Windows Server 2008 R2 SP1 yet.