Previewing ‘Windows 8’

The first preview of Microsoft's new Operating System, internaly codenamed "Windows 8" by Julie Larson-Green, Corporate Vice President, Windows Experience.

Popular posts from this blog

Configuring a Certificate on Exchange Receive Connector

Today's article is about configuring Exchange receive connectors with specific certificates. Out of the box, Exchange uses self signed certificates to provide TLS secured mail flow. This will definitely be an issue if you expose the SMTP protocol to client computers since they won't trust the certificate. In this article we are going to configure a certificate that was issued by a third part authority to the Client Frontend receive connector. We'll start with getting the thumbprint of the certificate using the Get-ExchangeCertificate cmdlet: [PS] C:\> Get-ExchangeCertificate Thumbprint                               Subject ----------                               ------- 241B864DC82C664FECBA18B8D54987AAFB65B4C2 CN=*.lab.com, ... D4D210886B34E690191A1F008C78FDD0E7325DD4 CN=Exchange2013A 960171662EB261162F9C8CBE12E0B75D6F06ABB0 CN=Microsoft Exchange Server Auth Certificate 2690324B827A9F2B75D59104F81CAAA57CDD627B CN=WMSvc-Exchange2013A [PS]
Keep reading

Domain Controller Machine Password Reset

Image
On my lab environment, I've configured two Active Directory sites since most enterprises have offices in more that one places. My lab however is not running 24/7 and the domain controllers in the second site are rarely turned on in order to save resources. This leads to issues with the Active Directory replication such as the "The target principal name is incorrect" error when I execute:  repadmin /syncall /AdeP. To remedy the issue, we have to reset the machine password of the domain controller that has been offline. First off, we are going to stop and disable the Kerberos Key Distribution Center (kdc) service on the problematic domain controller, in our case DC4. There may be some tickets in the cache so we should also clear them using klist purge Now it's time to change the machine password of the domain controller using the command netdom resetpwd /s:dc3 /ud:lab\administrator /pd:* Replace the "lab\administrator" with an account on your
Keep reading

IIS Client Certificate Revocation Check Disable

Image
A couple of weeks back, a certificate was approaching it's expiration date on an IIS server and the update - although pretty straight forward, caused a major issue for the service running on that server. I had the new certificate in PFX format, I've installed it on the computer certificate store and it was available in the IIS Manager console. All the certificates for the Root and Intermediate authorities were property installed and the clients had access to the CRL urls. However, when I switched the certificate, the clients were not able to communicate property with the website. After going through the logs on the clients and the application, I discovered that the clients were using client certificates in order to authenticate and the validation process was failing for those certificates since my server could not check their revocation. I opened up a command prompt to get more information on the bindings on the website since there are settings that are not available when
Keep reading