There's not much official business that NBA teams can finalize during the yearly July moratorium. Anyone who has paid attention to NBA free agency over the last decade knows that teams and players "unofficially" agree to terms on free agent signings during the moratorium, only to have those contracts finalized and signed as soon as the moratorium officially ends. And teams can come to agreements on trades as well, though those too cannot actually be agreed upon and approved by the league until the end of the six-day pause.
But a few bits of business can be conducted during the moratorium, such as signing rookies and agreeing to veteran minimum contracts.