You can save up to 10 Salesforce local connections.

• Maximum number of characters in a field is 32,000.
• Maximum number of concurrent data sync runs is 3.
• You can sync data from up to 100 objects in CRM Analytics. This total includes local and external objects.
• Connected object names must start with a letter and contain only letters, digits, or underscores. Object names can’t end with an underscore.
• Only field names with combinations of alphanumeric, dot, underscore, or dash characters are supported. If a connector includes field names that contain other characters, such as spaces or brackets, the sync fails.
• Queries that take longer than 10 minutes to return initial data to CRM Analytics causes a “timeout exceeded” error message. The best practice in this situation is to simplify or segment your queries.