In Indonesia, it is customary to greet a business associate with a handshake. However, there are some variations to this custom, depending on the region. In Java, it is common to bow slightly when shaking hands. In Sumatra, it is customary to pat the associate on the back.
In general, it is polite to smile and maintain eye contact when greeting someone. You may also say “Selamat Pagi” (Good Morning), “Selamat Siang” (Good Afternoon), or “Selamat Malam” (Good Evening) …