Thursday, January 20, 2011

DHCP Client Service Not Starting - Access Denied

Today one more interesting of my colleague received a complaint from user stating that "Shares on a server are not accessible". My colleague started investigating the issue and found that he is able to ping the server with IP Address, but not with host name.

As a work around, any system administrator would immediately create a static entry in DNS Server. But I tried to further investigate the issue.

Verified if DNS Server is pinging and able to telnet on required ports - Resulted in success
Verified if ipconfig /registerdns is working - Failed to register DNS entries. Encountered error "RPC Server Unavailable".

Upon further investigation found that "DHCP Client" Service is not running on the host. Encountered error 'Access Denied' when tried to start the service. Followed MS KB article, but those steps did not work.

Further googled to resolve the issue.. read in one of the article stating that problem persists when the server was infected with conficker virus/worm this issue arises. Even though the virus is cleaned. The issue will not be resolved. Particularly services which are configured to start with "Network Service" account.

Issue was resolved after installing Service Pack 2

Monday, January 10, 2011

Cloud Computing

Today IT world talks about Cloud Computing more frequently. While we talk about cloud computing arise with a basic doubt like What is cloud computing? What does it do? How does it serve IT Needs? What are the components available in Cloud Computing?

A cool blog from technet site from one of the blogger..

Friday, January 7, 2011

New OWA features in Exchange Server 2010

Two aspects of Exchange Server 2010 OWA received a lot of attention. First, Microsoft rebranded Outlook Web Access as Outlook Web App, but still refers to the interface as OWA. Second, the Options section of OWA is now the Exchange Control Panel.

Exchange Server 2010 introduces a few significant new OWA features.

Cross Web browser support Can be used using Firefox & Apple Safari

In Exchange Server 2007, the premium OWA client was designed for use with Internet Explorer 6.0 or higher. If you wanted to use an older version of IE or a non-Microsoft browser, you had to use OWA Light. Outlook Web App 2010 allows cross-browser support; the premium OWA client is compatible with Mozilla Firefox and Apple Safari. This finally gives Mac users the full OWA experience.

Conversation view

OWA can now display email conversations as conversation threads containing sent messages as well as received email, allowing users to keep track of responses (Figure 1). The entire thread can also be deleted or archived. Users also have the option to ignore the reminder of an ongoing conversation.

Figure 1. OWA displays messages as conversation threads.

Nickname cache

When you begin typing an email address, OWA automatically displays possible matches (Figure 2). This is great when sending email messages to recipients who are not listed in your contacts.

Figure 2. OWA 2010's nickname cache automatically displays possible email address matches.

Message tracking

Another great new feature in OWA is built-in message tracking. If a user wants to see if a message was delivered, they can go to their Sent Items folder, right-click on the message and choose the Open Delivery Report option. OWA will then display a delivery report for the message (Figure 3).

Figure 3. Users can perform message tracking in Outlook Web App.

Advanced search

You can now perform searches by folder, sender/recipient, and message category (Figure 4). You also have the option of basing the results on either the message's subject line or the entire message body.

Figure 4. OWA now offers advanced search capabilities.

Mail Tips

The Mail Tips feature displays important information about an email message before users click Send. For example, we've all encountered instances in which someone clicked Reply to All to a message they were blind copied on. OWA now warns users before they commit this common email blunder (Figure 5).

Figure 5. Mail Tips can save users from making common mistakes.

The Mail Tips feature can give users additional email message guidance. For example, it can inform the sender if the intended recipient has enabled Out of Office Assistant. It also alerts a user when he or she is about to send a message to a large number of recipients.

Message filtering

Message filtering gives users with large mailboxes the ability to view a subset of their messages. With this feature, users can filter mail to display only unread messages, or important messages or messages with attachments, for example (Figure 6).

Figure 6. Filtering in OWA lets users filter inboxes to only see specific messages.

As you can see in Figure 6, OWA has a section labeled Favorites, which is located in the upper left corner of the interface. One of the useful functions here is Unread Mail. Selecting this folder does the same thing as setting the unread mail filter does, but it actually saves a step. This shortcut lets users to view unread mail without having to create a filtered view every time they want to do this.