Currently when signing into ArcGIS Pro using an Enterprise named user two connections are made. One goes to Enterprise to authenticate and authorize the user and then a separate call to the License Manager to get the license. This creates an issue when a user is off network because the License Manager cannot currently be safely exposed to the internet. So a user can authenticate but not get a license when off network.
Please create a way for ArcGIS Pro licenses to be safely obtained from License Manager over the internet. That could be through ArcGIS Enterprise acting as a proxy between ArcGIS Pro and the License Manager, or maybe creating a "web adaptor" for License Manager.