From your 'My Hub' page (please see below)
On the left hand side of your account, you will see the side menu in which you can select 'Nutrition'.
You will see a list of all your created nutrition plans
If you then select 'Macros' from the 4 options at the top of your page...
You can then click 'Generate All Macros' which will automatically generate all active clients macros who have filled in all information during the sign-up process.