Bulk update of administrator role

[EricPlent]

I have a group of admins (approximately 500) where I want to change one of their roles currently assigned to a lower OG to a new role located at the top level OG. There does not appear to be a mechanism for doing this via the UI, so I assume either a bulk import or API call may be required. Any recommendations on how best to achieve this change? 

[ogushia]

You can bulk update admin user roles using the API (both adding and removing roles)
・Add new roles
https://asXXX.awmdm.com/api/help/#!/AdminsV2/AdminsV2_AddRoleToUser
・Delete the old role
https://asXXX.awmdm.com/api/help/#!/AdminsV2/AdminsV2_RemoveRoleFromUser

You can bulk edit the administrator using CSV import, but the action you can take is to add a role, so the user still has a lower OG roles.