Outlook Authentication

There is no connection between an email address and username.

You can change the UPN value to match, but if you were to change the email address for the user the UPN would not be the same.

Unfortunately Autodiscover has no way of knowing what the internal credentials are. Therefore you will have to continue to do what you are doing, which is change the authentication settings to the correct format.

When I deployments that will have non domain machines using the Exchange server, I will usually configure the server with the UPN to match the email address, as it makes things a lot easier to explain to the end users. OWA is then configured to use the UPN as well.

Simon.

Hi and Thanks for your comment

Unfortunately I did not understand a word really I am not asking to change anything or have a problem with certain configuration I just wanted to understand

I just want to know how come when I use firstname.lastname@domain.com and then add the password Outlook does not accept it and when I put Domain\WindowsLogOnName it works from Outside the company. Same with OWA it won't accept user's e-mail to log in.

You know when you Open Outlook and this box and this security credential box comes up?

How come and how can I configure future Exchange installations the same way.

Thanks

When logging onto any windows computer, it doesn't know if the user belongs to a local user account or part of a domain.

When you log in using domain\username or username@domain.com the computer interprets that as an active directory account and uses logic to decide how to find and authenticate that user.

When you just try using username to log in, the exchange server thinks it is a local user account since you didn't not tell it to look at a certain domain so it checks its local list of accounts. This user of course does not exist locally so it fails.

Thanks.

-  I will have to read this few times my difficulty is how a laptop in Unites States when being configured for Outlook it does not recognise the the user e-mail address and it does recognise the internal domain name?

2 - How can I configure Exchange / or Windows to accept Users e-mails to log on with on Outlook or OWA?

Thanks

I will have to comeback on this one