Email is not being fetched

Hello,

Unknown to me for about a week, none of the emails going to our support address are being fetched by SD+. I am not 100% sure but it seems to have coincided with a SP1 install on our Exchange 2007 box. This SP1 install failed and caused some grief but was rectified. However, in the meantime it has broke the fetching for SD+. I am getting the following message when I try to make any changes to the Mail Server settings:

FAILURE :Email Settings saved successfully. But error occured while trying to check connection with mail server - Authentication Failed using the given username and password.

I have reset the password and still no go. I am able to log into the account via our webmail.

Is there something that I am missing? I have only found one pertinent post on the forum and it was pertaining to ensuring that the alias is exactly the same as the user name. I have confirmed that this is true.

Any an all help is appreciated.

Thanks,
Chris