September 21, 2023 - Here's the most recently updated timeline.
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On March 23, we announced that we would be enabling a transport enforcement system in Exchange Onlin...
Updated Sep 21, 2023
Version 6.0
Blog Post
How long after a CU or SU has been released is a Hybrid connection point server considered out of date? Meaning when does the clock start ticking on the enforcement duration? 30 days after release? 60 days? 90 days? This is very important because most Organizations take over 30 days to patch their Lab/QA environments prior to Production. Also It is considered Standard Operating Procedure to wait a for a period of time before patching in case of a failed release (e.g. SU February 2023). If the clock starts ticking the moment a CU/SU has been released I consider this to be extremely aggressive given failed updates that have been released in the past.