10-12-2020 08:09 AM - edited 11-18-2020 03:13 AM
Check the step by step instructions in the attached…
This has been included into this Cisco Doc with more details:
Custom Web Authentication on Catalyst 9800 Wireless Controllers Configuration Example
https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/216121-custom-web-authentication-on-catalyst-98.html
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