...
Go to Configuration > Staff and resources > Roles
Click on the role you want to add a Dashboard to > Choose the Dashboard in the list under “User interface - Dashboard”
For each role, choose if you should leave the “Dashboard” field blank (the user cannot see a dashboard) or if you should set one of the dashboards you created. A role can not have more than one dashboard.
...
Notes
Some widgets display a currency. The currency is received from the current company. Dashboard does not support the setting sameCurrencyThroughoutTheInstallation.
...