/usr/share/dbus-1/services/com.ubuntu.OnlineAccountsUi.service is in ubuntu-system-settings-online-accounts 0.7+16.04.20160322-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=com.ubuntu.OnlineAccountsUi
Exec=/usr/bin/online-accounts-service
|