From the Moto forum administrator:
First, I want to thank everyone for their help and patience as we worked though this. Many of you tested our solution, made suggestions and otherwise contributed. Much appreciated.
Some Droid X users are experiencing an issue when attempting to access the Exchange server on their device through an unencrypted link. A fix for this will be included in the upgrade to Android 2.2 scheduled for deployment by early September.
This post describes two workarounds for owners who encounter this issue:
The first workaround can be attempted by any Droid X owner.
The second workaround requires changes to the Exchange server settings, and therefore can only be attempted by IT personnel with the appropriate knowledge.
A Droid X user can send these settings to his or her IT organization to implement the second workaround.
Description of the issue:
With phone software versions 1.13.5.10 & 1.13.6.2, a user will not be able to set up their corporate exchange email using ActiveSync on their device if their exchange server does NOT have SSL or certificates installed and the user is required to uncheck the option