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For Outlook if you open the email accounts --&gt; More settings --&gt; &nbsp;Click the security tab --&gt; &nbsp;Under User identification is Always prompt for username and password unchecked?
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For Outlook if you open the email accounts --> More settings -->  Click the security tab -->  Under User identification is Always prompt for username and password unchecked?

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Yes this is unchecked.<br />
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Thanks.
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There was an update recently that seemed to cause this problem.<br />
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Can you check my guide here: <a href="https://www.experts-exchange.com/articles/Software/Server_Software/Email_Servers/Exchange/Outlook-continually-prompting-for-username-and-password.html" rel="ugc nofollow">https://www.experts-exchange.com/articles/Software/Server_Software/Email_Servers/Exchange/Outlook-continually-prompting-for-username-and-password.html</a><br />
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specifically the Kerberos authentication part
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There was an update recently that seemed to cause this problem.

Can you check my guide here: https://www.experts-exchange.com/articles/Software/Server_Software/Email_Servers/Exchange/Outlook-continually-prompting-for-username-and-password.html [https://www.experts-exchange.com/articles/Software/Server_Software/Email_Servers/Exchange/Outlook-continually-prompting-for-username-and-password.html]

specifically the Kerberos authentication part

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I have several servers that run TS desktops for users via XenApp. Recently all users began being prompted for an Outlook and SharePoint login each time they logged into their Windows session. <br />
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these are W2K3 servers running Outlook 2007, connecting to an Exchange 2007 server, and all are on the domain.<br />
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If you choose to save the password, it will not save, but the domain\username stays.<br />
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If you do not ebter a password, you are connected to Outlook anyway. It is already Online.<br />
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Definitely seems DNS related but I'm not sure where else to look. No DNS or Kerberos errors on the DCs that are related that I can tell.<br />
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Thanks!
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I have several servers that run TS desktops for users via XenApp. Recently all users began being prompted for an Outlook and SharePoint login each time they logged into their Windows session. 

these are W2K3 servers running Outlook 2007, connecting to an Exchange 2007 server, and all are on the domain.

If you choose to save the password, it will not save, but the domain\username stays.

If you do not ebter a password, you are connected to Outlook anyway. It is already Online.

Definitely seems DNS related but I'm not sure where else to look. No DNS or Kerberos errors on the DCs that are related that I can tell.

Thanks!

Outlook 2007 prompts for password on member servers everytime. Seems DNS related

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.