Hi -- Thank you for pointing this out. It is a typo in the documentation and has been corrected.   Yes, your current co-termination date will be applied to all the devices currently in your organization. Then, after you convert, when you add another license (e.g. a 7-year license) to a new device, it will have a separate date compared to the devices/licenses that were converted.   "Current customers will not see a change in their expiration date when they convert to per-device licensing. When they purchase a new license/device and claim it into their organization, is when they will see a different expiration date. For example, if the customer's co-termination date is 1/1/2025 and they convert, their expiration date in per-device will be 1/1/2025 for all their devices/products. If they purchase 1 new AP with a 7-year license on 1/1/2020, the expiration date of that device will be 1/1/2027. The other devices will maintain the 1/1/2025 expiration date." ... View more

You had the 90 day option checked which means 12.3 cannot be downloaded as its still within the 90 days. If oyu disabled the delay completly then it will download the latest available version which is 12.4    What you have seen is normal, if you change you delay window to something smaller you will see that you can download 12.3   Apple recommends against using the 90 day option as they release updates earlier than the 90 day period which means your devices would never update.  ... View more