diff --git a/auth/iam.go b/auth/iam.go
index 1e66462..a702c65 100644
--- a/auth/iam.go
+++ b/auth/iam.go
@@ -119,7 +119,6 @@ type Opts struct {
 	LDAPRoleAtr            string
 	LDAPUserIdAtr          string
 	LDAPGroupIdAtr         string
-	LDAPDebug              bool
 	VaultEndpointURL       string
 	VaultSecretStoragePath string
 	VaultAuthMethod        string
@@ -159,7 +158,7 @@ func New(o *Opts) (IAMService, error) {
 	case o.LDAPServerURL != "":
 		svc, err = NewLDAPService(o.RootAccount, o.LDAPServerURL, o.LDAPBindDN, o.LDAPPassword,
 			o.LDAPQueryBase, o.LDAPAccessAtr, o.LDAPSecretAtr, o.LDAPRoleAtr, o.LDAPUserIdAtr,
-			o.LDAPGroupIdAtr, o.LDAPObjClasses, o.LDAPDebug)
+			o.LDAPGroupIdAtr, o.LDAPObjClasses)
 		fmt.Printf("initializing LDAP IAM with %q\n", o.LDAPServerURL)
 	case o.S3Endpoint != "":
 		svc, err = NewS3(o.RootAccount, o.S3Access, o.S3Secret, o.S3Region, o.S3Bucket,
diff --git a/auth/iam_ldap.go b/auth/iam_ldap.go
index cdda803..c16d862 100644
--- a/auth/iam_ldap.go
+++ b/auth/iam_ldap.go
@@ -22,6 +22,7 @@ import (
 
 	"github.com/davecgh/go-spew/spew"
 	"github.com/go-ldap/ldap/v3"
+	"github.com/versity/versitygw/debuglogger"
 )
 
 type LdapIAMService struct {
@@ -33,7 +34,6 @@ type LdapIAMService struct {
 	roleAtr    string
 	groupIdAtr string
 	userIdAtr  string
-	debug      bool
 	rootAcc    Account
 	url        string
 	bindDN     string
@@ -43,7 +43,7 @@ type LdapIAMService struct {
 
 var _ IAMService = &LdapIAMService{}
 
-func NewLDAPService(rootAcc Account, url, bindDN, pass, queryBase, accAtr, secAtr, roleAtr, userIdAtr, groupIdAtr, objClasses string, debug bool) (IAMService, error) {
+func NewLDAPService(rootAcc Account, url, bindDN, pass, queryBase, accAtr, secAtr, roleAtr, userIdAtr, groupIdAtr, objClasses string) (IAMService, error) {
 	if url == "" || bindDN == "" || pass == "" || queryBase == "" || accAtr == "" ||
 		secAtr == "" || roleAtr == "" || userIdAtr == "" || groupIdAtr == "" || objClasses == "" {
 		return nil, fmt.Errorf("required parameters list not fully provided")
@@ -65,7 +65,6 @@ func NewLDAPService(rootAcc Account, url, bindDN, pass, queryBase, accAtr, secAt
 		secretAtr:  secAtr,
 		roleAtr:    roleAtr,
 		userIdAtr:  userIdAtr,
-		debug:      debug,
 		groupIdAtr: groupIdAtr,
 		rootAcc:    rootAcc,
 		url:        url,
@@ -129,15 +128,15 @@ func (ld *LdapIAMService) CreateAccount(account Account) error {
 	return nil
 }
 
-func (ld *LdapIAMService) BuildSearchFilter(access string) string {
-	searchFilter := ""
+func (ld *LdapIAMService) buildSearchFilter(access string) string {
+	var searchFilter strings.Builder
 	for _, el := range ld.objClasses {
-		searchFilter += fmt.Sprintf("(objectClass=%v)", el)
+		searchFilter.WriteString(fmt.Sprintf("(objectClass=%v)", el))
 	}
 	if access != "" {
-		searchFilter += fmt.Sprintf("(%v=%v)", ld.accessAtr, access)
+		searchFilter.WriteString(fmt.Sprintf("(%v=%v)", ld.accessAtr, access))
 	}
-	return fmt.Sprintf("(&%v)", searchFilter)
+	return fmt.Sprintf("(&%v)", searchFilter.String())
 }
 
 func (ld *LdapIAMService) GetUserAccount(access string) (Account, error) {
@@ -152,13 +151,14 @@ func (ld *LdapIAMService) GetUserAccount(access string) (Account, error) {
 		0,
 		0,
 		false,
-		ld.BuildSearchFilter(access),
+		ld.buildSearchFilter(access),
 		[]string{ld.accessAtr, ld.secretAtr, ld.roleAtr, ld.userIdAtr, ld.groupIdAtr},
 		nil,
 	)
 
-	if ld.debug {
-		spew.Dump(searchRequest)
+	if debuglogger.IsIAMDebugEnabled() {
+		debuglogger.IAMLogf("LDAP Search Request")
+		debuglogger.IAMLogf(spew.Sdump(searchRequest))
 	}
 
 	err := ld.execute(func(c *ldap.Conn) error {
@@ -167,8 +167,9 @@ func (ld *LdapIAMService) GetUserAccount(access string) (Account, error) {
 		return err
 	})
 
-	if ld.debug {
-		spew.Dump(result)
+	if debuglogger.IsIAMDebugEnabled() {
+		debuglogger.IAMLogf("LDAP Search Result")
+		debuglogger.IAMLogf(spew.Sdump(result))
 	}
 
 	if err != nil {
@@ -246,7 +247,7 @@ func (ld *LdapIAMService) ListUserAccounts() ([]Account, error) {
 		0,
 		0,
 		false,
-		ld.BuildSearchFilter(""),
+		ld.buildSearchFilter(""),
 		[]string{ld.accessAtr, ld.secretAtr, ld.roleAtr, ld.groupIdAtr, ld.userIdAtr},
 		nil,
 	)
diff --git a/auth/iam_ldap_test.go b/auth/iam_ldap_test.go
new file mode 100644
index 0000000..7b77df1
--- /dev/null
+++ b/auth/iam_ldap_test.go
@@ -0,0 +1,56 @@
+package auth
+
+import "testing"
+
+func TestLdapIAMService_BuildSearchFilter(t *testing.T) {
+	tests := []struct {
+		name       string
+		objClasses []string
+		accessAtr  string
+		access     string
+		expected   string
+	}{
+		{
+			name:       "single object class with access",
+			objClasses: []string{"inetOrgPerson"},
+			accessAtr:  "uid",
+			access:     "testuser",
+			expected:   "(&(objectClass=inetOrgPerson)(uid=testuser))",
+		},
+		{
+			name:       "single object class without access",
+			objClasses: []string{"inetOrgPerson"},
+			accessAtr:  "uid",
+			access:     "",
+			expected:   "(&(objectClass=inetOrgPerson))",
+		},
+		{
+			name:       "multiple object classes with access",
+			objClasses: []string{"inetOrgPerson", "organizationalPerson"},
+			accessAtr:  "cn",
+			access:     "john.doe",
+			expected:   "(&(objectClass=inetOrgPerson)(objectClass=organizationalPerson)(cn=john.doe))",
+		},
+		{
+			name:       "multiple object classes without access",
+			objClasses: []string{"inetOrgPerson", "organizationalPerson", "person"},
+			accessAtr:  "cn",
+			access:     "",
+			expected:   "(&(objectClass=inetOrgPerson)(objectClass=organizationalPerson)(objectClass=person))",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ld := &LdapIAMService{
+				objClasses: tt.objClasses,
+				accessAtr:  tt.accessAtr,
+			}
+
+			result := ld.buildSearchFilter(tt.access)
+			if result != tt.expected {
+				t.Errorf("BuildSearchFilter() = %v, want %v", result, tt.expected)
+			}
+		})
+	}
+}
diff --git a/cmd/versitygw/main.go b/cmd/versitygw/main.go
index 5adde6c..635408a 100644
--- a/cmd/versitygw/main.go
+++ b/cmd/versitygw/main.go
@@ -64,7 +64,6 @@ var (
 	ldapQueryBase, ldapObjClasses            string
 	ldapAccessAtr, ldapSecAtr, ldapRoleAtr   string
 	ldapUserIdAtr, ldapGroupIdAtr            string
-	ldapDebug                                bool
 	vaultEndpointURL, vaultSecretStoragePath string
 	vaultAuthMethod, vaultMountPath          string
 	vaultRootToken, vaultRoleId              string
@@ -83,6 +82,7 @@ var (
 	ipaHost, ipaVaultName                    string
 	ipaUser, ipaPassword                     string
 	ipaInsecure, ipaDebug                    bool
+	iamDebug                                 bool
 )
 
 var (
@@ -400,12 +400,6 @@ func initFlags() []cli.Flag {
 			EnvVars:     []string{"VGW_IAM_LDAP_GROUP_ID_ATR"},
 			Destination: &ldapGroupIdAtr,
 		},
-		&cli.BoolFlag{
-			Name:        "iam-ldap-debug",
-			Usage:       "ldap server debug output",
-			EnvVars:     []string{"VGW_IAM_LDAP_DEBUG"},
-			Destination: &ldapDebug,
-		},
 		&cli.StringFlag{
 			Name:        "iam-vault-endpoint-url",
 			Usage:       "vault server url",
@@ -529,6 +523,13 @@ func initFlags() []cli.Flag {
 			Value:       3600,
 			Destination: &iamCachePrune,
 		},
+		&cli.BoolFlag{
+			Name:        "iam-debug",
+			Usage:       "enable IAM debug output",
+			Value:       false,
+			EnvVars:     []string{"VGW_IAM_DEBUG"},
+			Destination: &iamDebug,
+		},
 		&cli.StringFlag{
 			Name: "health",
 			Usage: `health check endpoint path. Health endpoint will be configured on GET http method: GET <health>
@@ -660,6 +661,10 @@ func runGateway(ctx context.Context, be backend.Backend) error {
 		debuglogger.SetDebugEnabled()
 	}
 
+	if iamDebug {
+		debuglogger.SetIAMDebugEnabled()
+	}
+
 	iam, err := auth.New(&auth.Opts{
 		RootAccount: auth.Account{
 			Access: rootUserAccess,
@@ -677,7 +682,6 @@ func runGateway(ctx context.Context, be backend.Backend) error {
 		LDAPRoleAtr:            ldapRoleAtr,
 		LDAPUserIdAtr:          ldapUserIdAtr,
 		LDAPGroupIdAtr:         ldapGroupIdAtr,
-		LDAPDebug:              ldapDebug,
 		VaultEndpointURL:       vaultEndpointURL,
 		VaultSecretStoragePath: vaultSecretStoragePath,
 		VaultAuthMethod:        vaultAuthMethod,
diff --git a/debuglogger/logger.go b/debuglogger/logger.go
index e849856..c38d493 100644
--- a/debuglogger/logger.go
+++ b/debuglogger/logger.go
@@ -115,6 +115,28 @@ func Infof(format string, v ...any) {
 	fmt.Printf(string(green)+debugPrefix+format+reset+"\n", v...)
 }
 
+var debugIAMEnabled atomic.Bool
+
+// SetIAMDebugEnabled sets the IAM debug mode
+func SetIAMDebugEnabled() {
+	debugIAMEnabled.Store(true)
+}
+
+// IsDebugEnabled returns true if debugging enabled
+func IsIAMDebugEnabled() bool {
+	return debugEnabled.Load()
+}
+
+// IAMLogf is the same as 'fmt.Printf' with debug prefix,
+// a color added and '\n' at the end
+func IAMLogf(format string, v ...any) {
+	if !debugIAMEnabled.Load() {
+		return
+	}
+	debugPrefix := "[DEBUG]: "
+	fmt.Printf(string(yellow)+debugPrefix+format+reset+"\n", v...)
+}
+
 // PrintInsideHorizontalBorders prints the text inside horizontal
 // border and title in the center of upper border
 func PrintInsideHorizontalBorders(color Color, title, text string, width int) {
diff --git a/go.mod b/go.mod
index 1540460..5ce411a 100644
--- a/go.mod
+++ b/go.mod
@@ -12,6 +12,7 @@ require (
 	github.com/aws/aws-sdk-go-v2 v1.38.1
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.87.1
 	github.com/aws/smithy-go v1.22.5
+	github.com/davecgh/go-spew v1.1.1
 	github.com/go-ldap/ldap/v3 v3.4.11
 	github.com/gofiber/fiber/v2 v2.52.9
 	github.com/google/go-cmp v0.7.0
@@ -41,7 +42,6 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/sso v1.28.2 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.33.2 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.38.0 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
 	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect