We have been using Meraki for years and all of a sudden last week Windows 10 clients weren't able to connect.  Auth would succeed on the Windows NPS server but on the client side they would get a message saying "Cant connect to this network" or something to that affect.  OSX clients can connect without issue.     Support team found that unchecking 'verify server certificate' allowed them connect.  So the ops team updated both certs and restarted NPS but still some users are getting the same message and unchecking that setting allows them to connect.     Does anyone have any idea what can be done on those Windows 10 clients to allow them to verify the cert and connect?  The cert is valid and the only think I can think of is something changed on those win10 clients that is preventing them installing or validating a new cert?  Note that we have alw ... View more

This is probably a better use of an ACL.  You can even create an ACL in advance that is a "permit any any", and the procedure will be to change that one "permit" to a "deny". https://documentation.meraki.com/MS/Other_Topics/Switch_ACL_Operation    An ACL will also allow you to bring up parts of the network as it gets restored (by adding in additional "permit" entries"). ... View more