You can check which Simple Authentication and Security Layer (SASL) authentication mechanisms are supported.
Using an LDAP browser, such as the one from Softerra, check the
values of the supportedSASLMechanisms attributes on
the root node of your LDAP server.
Note: The simple authentication method will not be reported because it is not a SASL mechanism.
If you use OpenLDAP, you can also query using
ldapsearch. For example:
ldapsearch -h localhost -p 389 -x -b "" -s base -LLL supportedSASLMechanisms dn: supportedSASLMechanisms: DIGEST-MD5 supportedSASLMechanisms: NTLM supportedSASLMechanisms: CRAM-MD5