Symptoms

You can’t log in to Microsoft Dynamics CRM Online. When you try logging in to CRM Online with your Windows Live ID (WLID) the screen goes blank, or partially loads, and then appears to be stuck in a loop of refreshing, reloading, or resetting. After about 5-10 seconds of reloading it shows the error message:

Windows Live ID is unavailable from this site for one of the following reasons:
• This site may be experiencing a problem
• The site may not be a member of Windows Live ID

This appears to be an issue with Internet Explorer. Here’s what fixed the problem for me for both times I’ve run into it.

In Internet Explorer ( I’m using version 8 )

• In the top menu click “Tools”
• Select “Internet Options” from the dropdown menu
• In the window that opens select the “Security” tab
• Select the “Trusted Sites” checkmark
• Click the “Sites” button
• In the window that opens in the area that says “Add this website to the zone”
  • Enter https://*.crm.dynamics.com and click “Add”
  • Then enter https://login.live.com and click “Add”
• Close all open windows
• Close and then open Internet Explorer