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The connector is developed using the SOAP API version 34.0 and tested with Salesforce Enterprise Edition ('16). Sandbox and production environments can be indexed by the connector.
Limitations
As of June 2016, it was not possible to list members of the computer generated group "All Internal Users". In our test environment this group is used for giving user permissions in Salesforce, but it is not possible to check if a given user is part of this group - to set accurate security permissions. It is possible to check if a user is internal - just not if it's an actual member of this group.
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