Cannot start Microsoft Office Outlook. Cannot Open the Outlook Window

I encountered this problem when CEO of one of our client companies complained that he cannot work properly because of this. At first, I tried to do with System Restore because I thought that it will solve the issue. After restarting, it's still the same. I thought of reinstalling MS Office applications but I had a doubt that it will fix the problem. I search in Google for the possible solutions but most of them didn't work except for this one:

Steps:

1. Go to Start--Run

2. Type outlook.exe /resetnavpane

Then the Outlook will open just fine. 

This is what this /resetnavpane do: It clears and regenerates the Navigation Pane for the current profile. It's like deleting your profilename.xml in your user directory. This command applies to MS Outlook 2003, 2007 and 2010.

"The name could not be resolved. The connection to MS Exchange server is unavailable, outlook must be online or connected to complete this action"

I experienced this issue when setting up new email account in Outlook 2007 with MS Exchange 2007. I've been searching from the internet for quite some time to solve this issue. I tried many recommended solutions from IT experts but those solutions didn't work. So isolate the issue and finally solved it.
Here's how I solved it.

Firstly,I tried to new "New Mailbox" for another user for the sake of testing. But when I'm done creating this new mailbox, there is an error message saying:

Summary: 1 items. 0 succeeded, 1 failed.

Elapsed time: 00:00:01


Administrator
Failed

Error:


An Exchange 2007 server on which an address list service is active cannot be found.

Management Shell command attempted:


Enable-Mailbox -Identity:'TEST.dk/Users/Administrator' -Alias:'Administrator' -Database:'CN=Mailbox Database,CN=First Storage Group,CN=InformationStore,CN=TEST-NT-EXC2007,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Demo,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=TEST,DC=dk'

Elapsed Time: 00:00:01

Checking the server's "Services", I found out that Microsoft Exchange System Attendant service is not started maybe due to unexpected shutdown of the server.

Here are the steps I went through:
1. In MS Exchange server, go to START-> RUN, then type services.msc.
2. Look for Microsoft Exchange System Attendant service then start it.
3. After that, I was able to create user account and finally connected to the Exchange server.

This solution worked for me, and I hope it will work for you as well, if not let me know.

Cheers!