Hello everyone, please help me set up LDAP authorization! 
I am interested in the relationship: email + password from the user account in the "AD" directory.
I tried to do it myself using this instruction: www.limesurvey.org/manual/Authentication_plugins but nothing comes out. As if everywhere you need to first create an account in the LimeSurvey database, and only then log in under the domain user account. 
And I want the domain user to just enter their email address and account password and log in. Is it even possible?
LimeSurvey Community Edition Version 6.2.2+230814

Here is my plugin AuthLDAP setup:

LDAP server: 
ldap://ad.moon.sp
Port number: 
389
LDAP version: 
LDAPv3
Select true if referrals must be followed (use false for ActiveDirectory): 
False
Enable Start-TLS: 
False
Select how to perform authentication.: 
Search and bind
Attribute to compare to the given login can be uid, cn, mail, ..: 
mail
Base DN for the user search operation. Multiple bases may be separated by a semicolon (: 
CN=limesurvey;CN=Users;DC=Moon;DC=sp
Optional extra LDAP filter to be ANDed to the basic (searchuserattribute=username) filter. Don't forget the outmost enclosing parentheses: 
None
Optional DN of the LDAP account used to search for the end-user's DN. An anonymous bind is performed if empty.: 
None
Password of the LDAP account used to search for the end-user's DN if previoulsy set.: 
Password of the limesurvey account
LDAP attribute of email address: 
None
LDAP attribute of full name: 
None
Check to make default authentication method: 
Yes
Automatically create user if it exists in LDAP server: 
Yes
Grant survey creation permission to automatically created users: 
Yes
Optional base DN for group restriction: 
None
Optional filter for group restriction: 
None
Allow initial user to login via LDAP: 
Yes

My server is MS Windows Server 2012 R2

But when logging in under credentials:
email address + domain account password, I get error:

Problem solved!
Here is the solution: github.com/LimeSurvey/LimeSurvey/blob/21...AP/AuthLDAP.php#L303