The digest-uri does not match any LDAP SPN's registered for this server

[alexavator]

Describe the bug
I got an error
The digest-uri does not match any LDAP SPN's registered for this server data 0, v4563. Result: 49. Method: BindSasl when I pass just username to Bind method
OR
DSID-0C09058A, comment: AcceptSecurityContext error, data 52e, v4563. Result: 49. Method: BindSasl when I pass usermane@domain to Bind method.

To Reproduce
const int ldapDomainAddressPort = 389;

var ldapConnection = new LdapConnection();
ldapConnection.Connect(domainName.ToLowerInvariant(), ldapDomainAddressPort);
var ldapCredential = new LdapCredential { UserName = userName, Password = plainPassword };
ldapConnection.Bind(Native.LdapAuthType.Digest, ldapCredential);
return ldapConnection;

Expected behavior
I expect successfull connection to AD.

Desktop (please complete the following information):

• OS: CentOS 7.9. On Windows the same code works well when I use username@domain. On Ubuntu 18.04 the same code works well when I use just username. But when I use username@domain I got the same error as on CentOS.
• Library version 2.7.2. With newest versions I got an error "libldap.so.2 could not be found" on both Ubuntu and Centos.
• .NET\core\mono version: .Net5
• LDAP server: Active Directory

[flamencist]

Hi! Please try to install appropriate open ldap libs on you computer and try to test ldap-utils before using library.

[alexavator]

Hi, @flamencist

I have installed the latest version of openldap-clients package and ldapsearch works correctly.

Also, after several attempts to fix it, I found out the solution - remove SASL_NOCANON parametr from ldap.conf file. But I am not really sure that it is the right solution.

[alexavator]

hi, is there something about this issue?