diff --git a/api/v1alpha1/smbcommonconfig_types.go b/api/v1alpha1/smbcommonconfig_types.go
index 42f11849..72ff70a6 100644
--- a/api/v1alpha1/smbcommonconfig_types.go
+++ b/api/v1alpha1/smbcommonconfig_types.go
@@ -38,6 +38,12 @@ type SmbCommonConfigSpec struct {
 	// under PodSettings allow admins and users to customize how pods
 	// are scheduled in a kubernetes cluster.
 	PodSettings *SmbCommonConfigPodSettings `json:"podSettings,omitempty"`
+
+	// GloabalConfig are configuration values that are applied to [gloabal]
+	// section in smb.conf for the smb server. This allows users to add or
+	// override default configurations.
+	// +opional
+	CustomGlobalConfig *SmbCommonConfigGlobalConfig `json:"customGlobalConfig,omitempty"`
 }
 
 // SmbCommonNetworkSpec values define networking properties for the services
@@ -61,6 +67,15 @@ type SmbCommonConfigPodSettings struct {
 	Affinity *corev1.Affinity `json:"affinity,omitempty"`
 }
 
+// SmbCommonConfigGlobalConfig contains values for customizing configs in
+// [global] section in smb.conf
+type SmbCommonConfigGlobalConfig struct {
+	// Check if the user wants to use custom configs
+	UseUnsafeCustomConfig bool `json:"useUnsafeCustomConfig,omitempty"`
+	// Configs specify keys and values to smb.conf
+	Configs map[string]string `json:"configs,omitempty"`
+}
+
 // SmbCommonConfigStatus defines the observed state of SmbCommonConfig
 type SmbCommonConfigStatus struct {
 	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
diff --git a/api/v1alpha1/smbshare_types.go b/api/v1alpha1/smbshare_types.go
index 31faefc2..c869dbb0 100644
--- a/api/v1alpha1/smbshare_types.go
+++ b/api/v1alpha1/smbshare_types.go
@@ -64,6 +64,11 @@ type SmbShareSpec struct {
 	// +optional
 	CommonConfig string `json:"commonConfig,omitempty"`
 
+	// CustomShareConfig specifies custom config values to be applied
+	// to share section in smb.conf
+	// +optional
+	CustomShareConfig *SmbShareConfig `json:"customShareConfig,omitempty"`
+
 	// Scaling specifies parameters relating to how share resources can and
 	// should be scaled.
 	Scaling *SmbShareScalingSpec `json:"scaling,omitempty"`
@@ -76,6 +81,14 @@ type SmbShareStorageSpec struct {
 	Pvc *SmbSharePvcSpec `json:"pvc,omitempty"`
 }
 
+// SmbShareConfig defines custom config values for share section
+type SmbShareConfig struct {
+	// Check if the user wants to use custom configs
+	UseUnsafeCustomConfig bool `json:"useUnsafeCustomConfig,omitempty"`
+	// Configs specify keys and values to smb.conf
+	Configs map[string]string `json:"configs,omitempty"`
+}
+
 // SmbSharePvcSpec defines how a PVC may be associated with a share.
 type SmbSharePvcSpec struct {
 	// Name of the PVC to use for the share.
diff --git a/config/crd/bases/samba-operator.samba.org_smbcommonconfigs.yaml b/config/crd/bases/samba-operator.samba.org_smbcommonconfigs.yaml
index feb8b40c..83d71aea 100644
--- a/config/crd/bases/samba-operator.samba.org_smbcommonconfigs.yaml
+++ b/config/crd/bases/samba-operator.samba.org_smbcommonconfigs.yaml
@@ -30,6 +30,18 @@ spec:
             spec:
               description: SmbCommonConfigSpec values act as a template for properties of the services that will host shares.
               properties:
+                customGlobalConfig:
+                  description: GloabalConfig are configuration values that are applied to [gloabal] section in smb.conf for the smb server. This allows users to add or override default configurations.
+                  properties:
+                    configs:
+                      additionalProperties:
+                        type: string
+                      description: Configs specify keys and values to smb.conf
+                      type: object
+                    useUnsafeCustomConfig:
+                      description: Check if the user wants to use custom configs
+                      type: boolean
+                  type: object
                 network:
                   description: Network specifies what kind of networking shares associated with this config will use.
                   properties:
diff --git a/config/crd/bases/samba-operator.samba.org_smbshares.yaml b/config/crd/bases/samba-operator.samba.org_smbshares.yaml
index ce34c62f..b5ebbfa7 100644
--- a/config/crd/bases/samba-operator.samba.org_smbshares.yaml
+++ b/config/crd/bases/samba-operator.samba.org_smbshares.yaml
@@ -54,6 +54,18 @@ spec:
                   description: CommonConfig specifies which SmbCommonConfig CR is to be used for this share. If left blank, the operator's default will be used.
                   minLength: 1
                   type: string
+                customShareConfig:
+                  description: CustomShareConfig specifies custom config values to be applied to share section in smb.conf
+                  properties:
+                    configs:
+                      additionalProperties:
+                        type: string
+                      description: Configs specify keys and values to smb.conf
+                      type: object
+                    useUnsafeCustomConfig:
+                      description: Check if the user wants to use custom configs
+                      type: boolean
+                  type: object
                 readOnly:
                   default: false
                   description: ReadOnly controls if this share is to be read-only or not.
diff --git a/internal/planner/configuration.go b/internal/planner/configuration.go
index f96ed019..854be0e0 100644
--- a/internal/planner/configuration.go
+++ b/internal/planner/configuration.go
@@ -96,6 +96,15 @@ func (pl *Planner) Update() (changed bool, err error) {
 		pl.ConfigState.Shares[shareKey] = share
 		changed = true
 	}
+	if pl.CommonConfig != nil {
+		if c := applyCustomGlobal(pl.ConfigState.Globals[smbcc.Globals],
+			pl.CommonConfig.Spec); c {
+			changed = true
+		}
+	}
+	if c := applyCustomShare(share, pl.SmbShare.Spec); c {
+		changed = true
+	}
 	if c := applyShareValues(share, pl.SmbShare.Spec); c {
 		changed = true
 	}
@@ -165,6 +174,44 @@ func (pl *Planner) Prune() (changed bool, err error) {
 	return
 }
 
+func applyCustomGlobal(globals smbcc.GlobalConfig, spec api.SmbCommonConfigSpec) bool {
+	changed := false
+	if spec.CustomGlobalConfig != nil {
+		// check if the user wants to use custom configs
+		// if not, just return
+		if !spec.CustomGlobalConfig.UseUnsafeCustomConfig {
+			return changed
+		}
+		for k, v := range spec.CustomGlobalConfig.Configs {
+			oriValue, ok := globals.Options[k]
+			if !ok || (ok && oriValue != v) {
+				globals.Options[k] = v
+				changed = true
+			}
+		}
+	}
+	return changed
+}
+
+func applyCustomShare(share smbcc.ShareConfig, spec api.SmbShareSpec) bool {
+	changed := false
+	if spec.CustomShareConfig != nil {
+		// check if the user wants to use custom configs
+		// if not, just return
+		if !spec.CustomShareConfig.UseUnsafeCustomConfig {
+			return changed
+		}
+		for k, v := range spec.CustomShareConfig.Configs {
+			oriValue, ok := share.Options[k]
+			if !ok || (ok && oriValue != v) {
+				share.Options[k] = v
+				changed = true
+			}
+		}
+	}
+	return changed
+}
+
 func applyShareValues(share smbcc.ShareConfig, spec api.SmbShareSpec) bool {
 	changed := false