I configured WAF for Exchange based on these instructions: https://sophserv.sophos.com/repo_kb/120454/file/Exchange%20WAF%20How%20to%209%202%20new.pdf
I use an AD CA so all of my certs are self-signed. I also tried to generate new certs within Sophos UTM and neither is working.
When I go here: https://domain.com/owa, I receive this error:
Request blocked
The web application firewall has blocked access to /owa/auth/logon.aspx for the following reason:
No signature found
Not sure what is going on. Any ideas?
UTM version is 9.210-20
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