I queried this with our enterprise CSM this morning:
IE will be retired in two phases to ensure a quality driven retirement. During the first phase, the redirection phase, devices will be progressively redirected from IE to Microsoft Edge over the next few months after June 15, 2022. Following industry best practices, this progressive redirection will be quality-driven to ensure a smooth IE11 retirement for you and your organization. To minimize the level of potential business disruption within an organization at one time, not all devices will be redirected at the same time. This approach is designed so that you can quickly identify and resolve any potential issues, such as missed sites, before all devices within your organization are redirected. The intent is for the redirection phase for all devices with Windows platforms that are in-scope for IE retirement to be complete in the next few months.
The terminology of 'progressively redirected' is very ambiguous.:
Q1: is this something already in IE11/Windows 10 SAC or something introduced by the June updates?
Q2: How does this manifest itself? Will it apply to internet sites, intranet sites and sites on the enterprise mode site list for IE11? Its very vague terminology!
Again, this vagueness and ambiguity is hurting Microsofts reputation in the IE team in my opinion and it's needless.