Office 365 Group Expiration and SharePoint Group Connected sites

We have a growing number of self-provisioned Office 365 groups. We also have a list of admin provisioned sites. We want to manage the growth of the self-provisioned using Office 365 Group Expiration Policies. What I can't get clear is, will these Group Expiration Policies apply to both self-provisioned and admin provisioned sites the same way? Or can we exclude sites we've created from expiring?