diff --git a/CHANGELOG.md b/CHANGELOG.md
index 842703e..6a1fd26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ Changelog for binary "usermgmt" and library "usermgmt_lib".
 
 ### Added
 
+- Added configuration field "ldap_default_user". Allows to define username for LDAP login used by default.
 - Added CLI option to specify the configuration file
 - Logging also performed to logging file
 - Ssh key pair can be provided by field within configuration file or as a CLI argument.
diff --git a/README.md b/README.md
index d2c7b01..39ece41 100644
--- a/README.md
+++ b/README.md
@@ -250,6 +250,8 @@ staff_gid = 1001
 faculty_gid = 1000
 # Path to sacctmgr binary
 sacctmgr_path = '/usr/local/bin/sacctmgr'
+# Default ldap username used by default if no username for LDAP login is provided.
+ldap_default_user = 'admim'
 # Domain components used for LDAP queries
 # Will be used in combination with ldap_org_unit 
 # and the cn of the username you provided for ldap login
diff --git a/usermgmt/src/cli_user_input.rs b/usermgmt/src/cli_user_input.rs
index 3641588..15b2dc8 100644
--- a/usermgmt/src/cli_user_input.rs
+++ b/usermgmt/src/cli_user_input.rs
@@ -2,9 +2,14 @@ use usermgmt_lib::prelude::{anyhow, AppResult, Context};
 
 use crate::user_input;
 
-pub fn ask_cli_username() -> AppResult<String> {
-    println!("Enter your LDAP username (defaults to admin):");
-    let username = user_input::line_input_from_user()?.unwrap_or_else(|| "admin".to_string());
+pub fn ask_cli_username(default_username: Option<&str>) -> AppResult<String> {
+    let default_prompt_name = default_username.unwrap_or("admin");
+    println!(
+        "Enter your LDAP username (defaults to {}):",
+        default_prompt_name
+    );
+    let username =
+        user_input::line_input_from_user()?.unwrap_or_else(|| default_prompt_name.to_string());
     Ok(username)
 }
 
diff --git a/usermgmt/src/ldap_cli_credential.rs b/usermgmt/src/ldap_cli_credential.rs
index 158bcbc..d4a1f3d 100644
--- a/usermgmt/src/ldap_cli_credential.rs
+++ b/usermgmt/src/ldap_cli_credential.rs
@@ -1,18 +1,30 @@
 use once_cell::unsync::OnceCell;
-use usermgmt_lib::{ldap::LdapCredential, prelude::AppResult};
+use usermgmt_lib::{config::MgmtConfig, ldap::LdapCredential, prelude::AppResult};
 
 use crate::cli_user_input;
 
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Clone)]
 pub struct LdapCliCredential {
+    default_username: Option<String>,
     username: OnceCell<String>,
     password: OnceCell<String>,
 }
 
+impl LdapCliCredential {
+    pub fn new(conf: &MgmtConfig) -> Self {
+        let default_username = conf.ldap_default_user.to_owned();
+        Self {
+            default_username,
+            username: Default::default(),
+            password: Default::default(),
+        }
+    }
+}
+
 impl LdapCredential for LdapCliCredential {
     fn username(&self) -> AppResult<&str> {
         self.username
-            .get_or_try_init(cli_user_input::ask_cli_username)
+            .get_or_try_init(|| cli_user_input::ask_cli_username(self.default_username.as_deref()))
             .map(|string| string.as_str())
     }
 
diff --git a/usermgmt/src/main.rs b/usermgmt/src/main.rs
index c2b1bf7..0d40f66 100644
--- a/usermgmt/src/main.rs
+++ b/usermgmt/src/main.rs
@@ -6,7 +6,7 @@ use cli_ssh_credential::CliSshCredential;
 use ldap_cli_credential::LdapCliCredential;
 use log::error;
 use std::process::ExitCode;
-use usermgmt_lib::cli::{Commands, GeneralArgs, OnWhichSystem};
+use usermgmt_lib::cli::{self, Commands, GeneralArgs, OnWhichSystem};
 use usermgmt_lib::config::{self};
 use usermgmt_lib::{operations, prelude::*, ChangesToUser, Entity};
 
@@ -43,8 +43,7 @@ fn execute_command() -> AppResult {
 /// - If the LDAP or SSH session could not be established because of connection problems or invalid
 /// credentials.
 /// - If some arguments in CLI, parameter `args`, for action are not valid.
-pub fn run_mgmt(args: GeneralArgs) -> AppResult {
-    let ldap_credential = LdapCliCredential::default();
+pub fn run_mgmt(args: cli::GeneralArgs) -> AppResult {
     match args.command {
         Commands::GenerateConfig => {
             // To StdOut, user can then pipe this default configuration wherever they please.
@@ -55,6 +54,7 @@ pub fn run_mgmt(args: GeneralArgs) -> AppResult {
             on_which_sys,
         } => {
             let config = config::load_config(args.config_file)?.config;
+            let ldap_credential = LdapCliCredential::new(&config);
             let on_which_sys = &OnWhichSystem::from_config_for_all(&config, &on_which_sys);
             let cli_ssh_credential = CliSshCredential::new(&config, on_which_sys.ssh_path());
             operations::add_user(
@@ -67,6 +67,7 @@ pub fn run_mgmt(args: GeneralArgs) -> AppResult {
         }
         Commands::Modify { data, on_which_sys } => {
             let config = config::load_config(args.config_file)?.config;
+            let ldap_credential = LdapCliCredential::new(&config);
             let on_which_sys = &OnWhichSystem::from_config_for_slurm_ldap(&config, &on_which_sys);
             let cli_ssh_credential = CliSshCredential::new(&config, on_which_sys.ssh_path());
             let data = Entity::new_modifieble_conf(data, &config)?;
@@ -81,6 +82,7 @@ pub fn run_mgmt(args: GeneralArgs) -> AppResult {
         }
         Commands::Delete { user, on_which_sys } => {
             let config = config::load_config(args.config_file)?.config;
+            let ldap_credential = LdapCliCredential::new(&config);
             let on_which_sys = &OnWhichSystem::from_config_for_slurm_ldap(&config, &on_which_sys);
             let cli_ssh_credential = CliSshCredential::new(&config, on_which_sys.ssh_path());
             operations::delete_user(
@@ -96,6 +98,7 @@ pub fn run_mgmt(args: GeneralArgs) -> AppResult {
             simple_output_for_ldap,
         } => {
             let config = config::load_config(args.config_file)?.config;
+            let ldap_credential = LdapCliCredential::new(&config);
             let on_which_sys = &OnWhichSystem::from_config_for_slurm_ldap(&config, &on_which_sys);
             let cli_ssh_credential = CliSshCredential::new(&config, on_which_sys.ssh_path());
             operations::print_list_of_users_to_stdout(
diff --git a/usermgmt_gui/src/drawing/configuration.rs b/usermgmt_gui/src/drawing/configuration.rs
index 2eac442..a66ef0d 100644
--- a/usermgmt_gui/src/drawing/configuration.rs
+++ b/usermgmt_gui/src/drawing/configuration.rs
@@ -257,6 +257,7 @@ fn construct_fields(config: &mut MgmtConfig, map: CacheForConfFields) -> Vec<Con
         create_conf_field!(staff_qos),
         create_conf_field!(valid_slurm_groups),
         create_conf_field!(compute_nodes),
+        create_conf_field!(ldap_default_user),
         create_conf_field!(ldap_domain_components),
         create_conf_field!(ldap_org_unit),
         create_conf_field!(ldap_bind_org_unit),
diff --git a/usermgmt_gui/src/drawing/draw_listing_of_users.rs b/usermgmt_gui/src/drawing/draw_listing_of_users.rs
index bf29b66..a52fb8e 100644
--- a/usermgmt_gui/src/drawing/draw_listing_of_users.rs
+++ b/usermgmt_gui/src/drawing/draw_listing_of_users.rs
@@ -223,7 +223,7 @@ pub fn draw(window: &mut UsermgmtWindow, ui: &mut egui::Ui) {
                             &mgmt_conf,
                             LdapSimpleCredential::new(username, password),
                         )?;
-                        list_ldap_users(config)
+                        list_ldap_users(&config)
                     },
                     "Listing ldap user".to_owned(),
                 );
diff --git a/usermgmt_gui/src/main_logic/query_io_tasks.rs b/usermgmt_gui/src/main_logic/query_io_tasks.rs
index 01b756d..1e1ed66 100644
--- a/usermgmt_gui/src/main_logic/query_io_tasks.rs
+++ b/usermgmt_gui/src/main_logic/query_io_tasks.rs
@@ -6,6 +6,7 @@ pub fn query(window: &mut UsermgmtWindow) {
     if let Some(conf) = window.conf_state.io_conf.query_task() {
         let listing_state = &mut window.listin_state;
         let ssh_state = &mut window.ssh_state;
+        let ldap_cred = &mut window.ldap_state;
         let path = &mut window.conf_path;
         path.clone_from(&conf.path);
         let config = &conf.config;
@@ -23,6 +24,12 @@ pub fn query(window: &mut UsermgmtWindow) {
             debug!("GUI: Ssh user name taken from default ssh user in loaded config");
             ssh_state.username = Some(config.default_ssh_user.to_owned());
         }
+        if ldap_cred.username.is_none() {
+            if let Some(ldap_user_name) = config.ldap_default_user.as_deref() {
+                debug!("GUI: ldap user name taken from default ldap user in loaded config");
+                ldap_cred.username = Some(ldap_user_name.to_owned());
+            }
+        }
     }
     if let Some(path) = window.conf_state.io_save_conf.query_task() {
         window.conf_path = path.to_path_buf();
diff --git a/usermgmt_lib/src/config.rs b/usermgmt_lib/src/config.rs
index ed281ec..58e3700 100644
--- a/usermgmt_lib/src/config.rs
+++ b/usermgmt_lib/src/config.rs
@@ -28,6 +28,7 @@ pub struct MgmtConfig {
     pub staff_gid: i32,
     pub faculty_gid: i32,
     pub sacctmgr_path: String,
+    pub ldap_default_user: Option<String>,
     pub ldap_domain_components: Option<String>,
     pub ldap_org_unit: Option<String>,
     pub ldap_server: String,
@@ -107,6 +108,7 @@ impl Default for MgmtConfig {
             staff_gid: 1001,
             faculty_gid: 1000,
             sacctmgr_path: "/usr/local/bin/sacctmgr".to_string(),
+            ldap_default_user: None,
             ldap_domain_components: None,
             ldap_org_unit: None,
             ldap_server: "ldap://localhost:389".to_string(),
diff --git a/usermgmt_lib/src/ldap.rs b/usermgmt_lib/src/ldap.rs
index 2c34cdc..466f518 100644
--- a/usermgmt_lib/src/ldap.rs
+++ b/usermgmt_lib/src/ldap.rs
@@ -223,13 +223,13 @@ where
 ///
 /// - If the connection to the LDAP instance fails. See [`make_ldap_connection`]
 /// - If the searching in LDAP failed
-pub fn list_ldap_users<T>(ldap_config: LDAPConfig<T>) -> AppResult<LdapSearchResult>
+pub fn list_ldap_users<T>(ldap_config: &LDAPConfig<T>) -> AppResult<LdapSearchResult>
 where
     T: LdapCredential,
 {
     // Establish LDAP connection and bind
     let mut ldap =
-        make_ldap_connection(&ldap_config).context("Error while connecting via LDAP !")?;
+        make_ldap_connection(ldap_config).context("Error while connecting via LDAP !")?;
 
     debug!(
         "LDAP connection established to {}. Will search under {}",
diff --git a/usermgmt_lib/src/operations.rs b/usermgmt_lib/src/operations.rs
index a89b9f9..f6e9538 100644
--- a/usermgmt_lib/src/operations.rs
+++ b/usermgmt_lib/src/operations.rs
@@ -4,7 +4,7 @@ use crate::{
     cli::{OnWhichSystem, UserToAdd},
     config::MgmtConfig,
     dir,
-    ldap::{self, text_list_output, LDAPConfig, LdapCredential, LdapSession},
+    ldap::{self, text_list_output, LdapCredential, LdapSession},
     slurm,
     ssh::{SshConnection, SshCredentials},
     AppResult, ChangesToUser, NewEntity,
@@ -127,8 +127,8 @@ where
         ldap_credentials.clone(),
         &credentials,
         true,
-        |_ldap_session| {
-            let ldap_config = LDAPConfig::new_readonly(config, ldap_credentials)?;
+        |ldap_session| {
+            let ldap_config = ldap_session.config();
             let search_result_data = ldap::list_ldap_users(ldap_config)?;
 
             let output = if simple_output_ldap {