Since I’ve been successful correcting many Dynamics CRM Outlook issues, some with the help of my friends at Microsoft Support (you peeps rock!), I frequently get asked to assist when clients encounter an unexpected issue. I recently ran into a new issue so I thought I would share the resolution.
The Issue was that the client was unable to install the CRM Outlook Client. The installation would fail at the Prerequisite step which is basically the first step in the process. Following is the error message with screenshot:
The error message from the log file was:
Microsoft Online Services Sign-in Assistant did not download successfully. To try again, ensure your internet connection is working, then try again.
Since the internet connection was working, I first tried the suggestion from the CRM Wiki which was to run a repair on the Windows Live ID Sign-in assistant. I also downloaded the Microsoft Online Services Sign-in Assistant in hopes that it would not need to look for it and download it if it was already present. Unfortunately, in this scenario neither solution worked. Since I had already burned a few hours troubleshooting the issue, I decided to try my fallback solution which is to download the RTM version of the product then apply updates. If you don’t have a link to that version then you can contact Microsoft Support and see if they have one that they can give to you.
Cheers
Donna Edwards 
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