NOTE: You must have Web Admin access to access the Account contacts option in My Sage and to follow the steps below. 

1. Visit my.sage.co.uk then click Sign in.
2. Enter your My Sage Login Email and Password and click Log in.
3. If prompted, click Select for the required company.
4. Click the Account tab, then click Account contacts.
5. Click Edit next to the relevant contact. 
   View screenshot

   
6. Choose if the contact has to your account, and what type of access they have. 
   View screenshot