In the MSCRM2011 IFD environment got this error, but in on premise doesn't have this problem.
I check the GAC of CRM server and the client machine, the "Microsoft.SharePoint.Client.dll" is there. I don't understand where is the application is searching for the 'Microsoft.SharePoint.Client'
The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.Could not load file or assembly 'Microsoft.SharePoint.Client, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.The application terminated with an error.The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters.