In large organizations that license ArcGIS Pro through named user accounts, all of the users will start to receive license expiration messages when they start ArcGIS Pro a couple of weeks before their ArcGIS Online account renews. These messages can be disabled by the individual users, but it would be better if the ArcGIS Online organization administrator could disable these for all ArcGIS Pro users. That would save a lot of worry and frantic calls to the administrator, as well as a little trouble for the end users.
Another solution would be to just automatically renew the named user licenses as soon as the organization subscription is renewed.