what is the location used by users to configure delegate access on their own mailboxes?\nbackstage view >…

Brief Explanations:

In many email - client systems, to configure delegate access on one's own mailbox, the backstage view and then permissions is a common location for such settings. It is not typically in the inbox or calendar directly for this specific configuration, and account settings are more for general account - related configurations rather than delegate access.

Answer:

Backstage view > Permissions