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Have an Exchange 2003/2007 setup. &nbsp;The only thing left on 2003 is public folders, all else is already moved to Exchange 2007. &nbsp;Have HTTP over RPC configured and works correctly. &nbsp; Problem started after last Microsoft patches (may be a coincidence) and server reboots.<br />
Now, Some (not all) of my Outlook clients get an authentication popup when launching Outlook. &nbsp;Outlook /rpcdiag shows the process stalling when trying to connect to the public folders on Exchange 2003.<br />
I have looked at everything that appears to be obvious, what am I overlooking?<br />
<br />
Thanks in advance!
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Have an Exchange 2003/2007 setup.  The only thing left on 2003 is public folders, all else is already moved to Exchange 2007.  Have HTTP over RPC configured and works correctly.   Problem started after last Microsoft patches (may be a coincidence) and server reboots.
Now, Some (not all) of my Outlook clients get an authentication popup when launching Outlook.  Outlook /rpcdiag shows the process stalling when trying to connect to the public folders on Exchange 2003.
I have looked at everything that appears to be obvious, what am I overlooking?

Thanks in advance!

Outllook  credentials popup internal to LAN

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

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.