Hosted SharePoint environment often has mapping of user email to an internal user names on the provider's local domain. In order to learn the exact user name used by SharePoint do the following:
* Login to your hosted Microsoft Online, BPOS or other hosted SharePoint
* Click on your "Welcome " on the top of the page
* Select My Settings
* Look at the Account property
* Use Account as a user on the MetaVis connection wizard to connect to SharePoint
* You can use the complete domain\user account name in the user field or type user in the user field and domain in the domain field