Which command will display the groups a user belongs to on a remote SMB server?

The command that will effectively display the groups a user belongs to on a remote SMB server is the one related to user information. Specifically, net rpc user info retrieves information about a user on a Samba server, including the groups associated with that user.

When working with Samba, net rpc user info is particularly useful for understanding user access and roles within the context of the remote SMB server. It provides a clear view of the user's details as managed by Samba, which includes group memberships—this directly answers the question regarding group affiliations.

In contrast, other commands focus on different aspects of the SMB environment. For instance, net rpc group info typically provides information regarding a specific group rather than detailing a user's memberships. Similarly, net rpc group member is designed to show members of a specific group, not the groups associated with a user. Lastly, smblookup member is not relevant when it comes to checking an individual user's group memberships; it is more often associated with querying information in the Samba name service. Thus, the chosen command serves the intended purpose of retrieving user group affiliations effectively.