Response to my case. ------------------------------ Good day! Engineering has identified on the fix, and it is coming in upcoming releases of all major releases ie. 8.1.15, 9.0.9, 9.1.3. With the fix, we will evaluate the leaf node, and chain up to trust store. Tentative ETA is around Mid-June. I would also like to update you that we have put together a customer advisory if you would like to take a look - https://live.paloaltonetworks.com/t5/customer-advisories/decryption-errors-created-by-the-expired-addtrust-external-root/ta-p/330976
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