i am using cflap for authentication and i often see an error in my logs for the accounts logged, the accounts are correct and does not seems to be having any problem, but i constantly see the issue in logs as;

An error has occurred while trying to execute query :[LDAP: error code 49 - 80090308: LdapErr: DSID-0C090447, comment: AcceptSecurityContext error, data 52e, v3839 ].

This is the first time i see this error for cflap, any clues what is going on here

Bad credentials, usually a bad password.

Yep, it's an authentication failure error (googling the error code... many many matches... might be worth wading through those?) Is there a chance you've got "unorthodox" characters in yer FDN? Even a space will need special handling. Given it's an authentication error, how are you determining your creds are actually correct? Cos like the server doesn't think so, and it's its opinion that matters here 😉 Maybe tell us a bit more about yer troubleshooting. @mk pls try to keep yer comments on the same topic threaded.