Outlook 2007 SP2 Prompt for Password

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Last week, several users reported that they were getting prompted to enter their domain logon credentials in Outlook 2007 SP2. We did not make any changes in our Exchange 2010 environment that would have caused this.
I've confirmed our AutoDiscover URLs are set up correctly, there are no problems with our SSL Certificates, the authentication settings for the IIS virtual directories are set up correctly, and there are no problems with our Client Access Server array.
I've confirmed our Outlook clients look good via running the Test E-mail AutoConfiguration utility.
Does anyone have any other suggestions how to troubleshoot and fix this issue?

AndyD_ [MVP]

What is Outlook Anywhere client auth set to?

If there was a " network" issue, then Outlook may have fallen back to OA and if set to basic, the clients would be prompted for their passwords.

Evan Liu


I want to clarify whether only the users who are using Outlook 2007 SP2 encountered the problem?

If so, please install the latest updates to have a try.

If not, please confirm the following information:

1. For the domain-connected users, the Window credential is used to do the authentication when contacting Autodiscover service. If the credential is not stored in Windows Profile, you need to input that.

2. Please check whether the users have choose “Always Prompt for user Name and Password” on their clients.

If the problem persists, please feel free to let me know.


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