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    We are using CRM 4.0. Our Windows XP machines run Office 2007. Our Windows 7 machines run Office 2010.

    We ran into the issue where the CRM plugin would load correctly, but when the user would open A CRM folder (for example Competitors or Contacts beneath Microsoft Dymanics CRM) an Windows Security authentication window would pop up. Entering domain credentials or cancelling 4 times would allow the user to continue working.

    When we initially ran into the problem various Technet documentation led us to a solution: changing/adding the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_SUBDOWNLOAD_LOCKDOWN\outlook.exe to a RED_DWORD value of 0 would solve the issue. (We also added this for the HKEY_CURRENT_USER).

    This solved the issue for the Office 2007/Windows XP machines.

    Now with the rollout of Office 2010/Windows 7 we once again run into the same problem. No solution I have found worked. We are currently on Rollup 13, though I have installed the client side rollup 15 and the same problem popped up again.

    I know this is IE related, as the registry key above and the fact that clearing the browser cache is the best way to replicate the issue point in that direction.

    Any thoughts on this?

    Thursday, February 3, 2011 2:24 PM

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    I eventually stumbled upon the solution when searching through the registry.

    Originally I changed the following registry value to 0:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_SUBDOWNLOAD_LOCKDOWN\outlook.exe

    Apparently when using Office 2010 and Internet Explorer 8 (both 32-bit applications) and Windows 7 64-bit (I don't know which of the two is the culprit) I also have to change the following registry key value to 0:

    HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_SUBDOWNLOAD_LOCKDOWN\outlook.exe

    No more popups!

    Cheers,

    Willem

    Tuesday, February 15, 2011 10:06 AM

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    Willem,

    Can you try this,

    - Add your CRM site to the "Trusted Sites" in Internet Explorer -> Tools -> Security TAB ->  Trusted  Sites - > Sites - > Add

    - Internet Explorer -> Tools -> Security TAB -> Local Intranet - > Custom Level - > User      Authentication -> "Automatic Logon only in Intranet Zone " is checked.


    Cheers, Edwin
    Friday, February 4, 2011 7:47 AM
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    Thanks for the reply.

    Currently we use GPO to add the crm site (crm.domain:port) to the Intranet zone, with the authentication window mentioned. Changing the crm site to the Trusted Sites zone makes no difference, the popup window still shows up. (We verify the zone assignment by browsing to the crm site manually).

    When connecting to CRM via outlook, the message we get lists an authentication issue to the crm site, but does not mention the port, ie:

    Windows Security

    Connecting to crm.domain

    No mention of the port number.

    I initially thought this could be the cause but the zone assignment is done without port number, and functions correctly -with- the port number anyway.

    Any other steps you would think I could take?

    Friday, February 4, 2011 8:41 AM
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    I eventually stumbled upon the solution when searching through the registry.

    Originally I changed the following registry value to 0:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_SUBDOWNLOAD_LOCKDOWN\outlook.exe

    Apparently when using Office 2010 and Internet Explorer 8 (both 32-bit applications) and Windows 7 64-bit (I don't know which of the two is the culprit) I also have to change the following registry key value to 0:

    HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_SUBDOWNLOAD_LOCKDOWN\outlook.exe

    No more popups!

    Cheers,

    Willem

    Tuesday, February 15, 2011 10:06 AM
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    Willem, thanks for taking the time to answer your own question. I'm sure you post will be helpful to someone else who finds themselves in a similar situation.

    Neil Benson, CRM Addict and MVP at Customery Ltd. You can reach me on LinkedIn or Twitter. Join over 10,000 other CRM professionals on the Microsoft Dynamics CRM group on LinkedIn.

    Tuesday, February 15, 2011 10:11 AM
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