IssueWhen configuring Tableau Server for Linux to use LDAPS authentication, all json key values are case-sensitive, including "sslPort". If your IdentityStore json file uses "sslport" the value will not be set, resulting in one of two issues:
If your LDAP server only accepts LDAPS requests on port 636, your initial configuration will fail with the error "Authentication Configuration Error: Identity store configuration error. Check that the configuration is valid."
If your LDAP server accepts requests over both LDAP and LDAPS, initial configuration will succeed, but future requests to the LDAP server will occur over port 389 using LDAP instead of port 636 using LDAPS. You may set up a Wireshark trace to capture the packets being sent and confirm that the identity store config file is trying to communicate on port 389.