1. Navigate to Users > Administrators via the left-hand navigation bar.
2. Select the admin user you want to give Historical Analytics access to.
3. Click on the User Roles tab on top.
4. Click on the Add main account access button under the Assigned Main Account Roles section.
5. Select the corresponding account.
6. Click Save.
7. Navigate to the Basic Info tab of the same user.
8. Select the access level you want given to this user under the Access Historical Analytics dropdown.
9. Click Save.