Using Outlook for Mac 2011 I can't connect to my Exchange account.

I have read the tutorials and online support pages.

I have consulted my IT administrator who repeatedly confirmed that my settings are correct and everything should work.

My organization uses Exchange Server 2010.

My account credentials and Exchange server name are correct.

Outlook is set to work online.

My network connection is available.

The server that is running Microsoft Exchange Server is available.

My Exchange account does not require me to log on by using an encrypted channel.

My computer does not require a mail proxy server to connect to the Exchange server.

On top of all of that, I can't check my email on Outlook Web Access(OWA) on my mac either. My company uses Lync and that has stopped connecting as well.  All of these were working at some point.

However I can check my email on OWA on any other pc - windows or mac in the office and at home.  Other people are able to check their mail on my mac and I can access the internet on my mac with no problems.


Since the problem arose, I uninstalled and reinstalled Office but when I go to create an Account in Outlook using my Exchange account, it just tells me that the authentication has failed.


Please tell me that someone out there can tell me what's up????