Friday, April 20, 2018

Disabling TLS 1.0 on Windows SBS 2011 Breaks LDAP and OWA access

Hello!

I was hoping someone could shine some light on an issue we are experiencing. We need to disable TLS 1.0 and RC4 cipher suits on our SBS 2011 to be PCI compliant. When we turn off TLS 1.0 on the server, our LDAP connection breaks to our firewall for our VPN users and our OWA (outlook web access) breaks. Does this come down to the browsers the users are using for OWA access? Our LDAP to our firewall for VPN users is setup to authenticate Domain users. We use LDAP version 3 over TLS (SSL) on port 636. I have not been able to pin point why these 2 items break when turning off TLS 1.0 on the server. Any thoughts?



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