Establish an OrganizationAccountAccess IAM group within each member account, incorporating the requisite IAM roles for administration.

Develop an OrganizationAccountAccessPolicy IAM policy in every member account and link these accounts to the management account using cross-account access mechanisms.

Set up an OrganizationAccountAccessRole IAM role in each member account, allowing the management account to assume this role and thereby manage permissions.

Create an OrganizationAccountAccessRole IAM role within the management account, attach the AdministratorAccess AWS managed policy to it, and assign this role to the administrators across all member accounts.