diff --git a/assets/js/admin/wc-enhanced-select.js b/assets/js/admin/wc-enhanced-select.js
index 4379731c339..dea8229cdfb 100644
--- a/assets/js/admin/wc-enhanced-select.js
+++ b/assets/js/admin/wc-enhanced-select.js
@@ -138,15 +138,15 @@ jQuery( function( $ ) {
 				var select2_args = {
 					allowClear:  $( this ).data( 'allow_clear' ) ? true : false,
 					placeholder: $( this ).data( 'placeholder' ),
-					minimumInputLength: $( this ).data( 'minimum_input_length' ) ? $( this ).data( 'minimum_input_length' ) : '3',
+					minimumInputLength: $( this ).data( 'minimum_input_length' ) ? $( this ).data( 'minimum_input_length' ) : '1',
 					escapeMarkup: function( m ) {
 						return m;
 					},
 					ajax: {
 						url:         wc_enhanced_select_params.ajax_url,
 						dataType:    'json',
-						quietMillis: 250,
-						data: function( params ) {
+						delay:       250,
+						data:        function( params ) {
 							return {
 								term:     params.term,
 								action:   'woocommerce_json_search_customers',
diff --git a/assets/js/admin/wc-enhanced-select.min.js b/assets/js/admin/wc-enhanced-select.min.js
index 437a454478a..c8bd339fa96 100644
--- a/assets/js/admin/wc-enhanced-select.min.js
+++ b/assets/js/admin/wc-enhanced-select.min.js
@@ -1 +1 @@
-jQuery(function(a){function b(){return{language:{errorLoading:function(){return wc_enhanced_select_params.i18n_searching},inputTooLong:function(a){var b=a.input.length-a.maximum;return 1===b?wc_enhanced_select_params.i18n_input_too_long_1:wc_enhanced_select_params.i18n_input_too_long_n.replace("%qty%",b)},inputTooShort:function(a){var b=a.minimum-a.input.length;return 1===b?wc_enhanced_select_params.i18n_input_too_short_1:wc_enhanced_select_params.i18n_input_too_short_n.replace("%qty%",b)},loadingMore:function(){return wc_enhanced_select_params.i18n_load_more},maximumSelected:function(a){return 1===a.maximum?wc_enhanced_select_params.i18n_selection_too_long_1:wc_enhanced_select_params.i18n_selection_too_long_n.replace("%qty%",a.maximum)},noResults:function(){return wc_enhanced_select_params.i18n_no_matches},searching:function(){return wc_enhanced_select_params.i18n_searching}}}}a(document.body).on("wc-enhanced-select-init",function(){a(":input.wc-enhanced-select, :input.chosen_select").filter(":not(.enhanced)").each(function(){var c=a.extend({minimumResultsForSearch:10,allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder")},b());a(this).select2(c).addClass("enhanced")}),a(":input.wc-enhanced-select-nostd, :input.chosen_select_nostd").filter(":not(.enhanced)").each(function(){var c=a.extend({minimumResultsForSearch:10,allowClear:!0,placeholder:a(this).data("placeholder")},b());a(this).select2(c).addClass("enhanced")}),a(":input.wc-product-search").filter(":not(.enhanced)").each(function(){var c={allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder"),minimumInputLength:a(this).data("minimum_input_length")?a(this).data("minimum_input_length"):"3",escapeMarkup:function(a){return a},ajax:{url:wc_enhanced_select_params.ajax_url,dataType:"json",quietMillis:250,data:function(b){return{term:b.term,action:a(this).data("action")||"woocommerce_json_search_products_and_variations",security:wc_enhanced_select_params.search_products_nonce,exclude:a(this).data("exclude"),include:a(this).data("include"),limit:a(this).data("limit")}},processResults:function(b){var c=[];return b&&a.each(b,function(a,b){c.push({id:a,text:b})}),{results:c}},cache:!0}};if(c=a.extend(c,b()),a(this).select2(c).addClass("enhanced"),a(this).data("sortable")){var d=a(this),e=a(this).next(".select2-container").find("ul.select2-selection__rendered");e.sortable({placeholder:"ui-state-highlight select2-selection__choice",forcePlaceholderSize:!0,items:"li:not(.select2-search__field)",tolerance:"pointer",stop:function(){a(e.find(".select2-selection__choice").get().reverse()).each(function(){var b=a(this).data("data").id,c=d.find('option[value="'+b+'"]')[0];d.prepend(c)})}})}}),a(":input.wc-customer-search").filter(":not(.enhanced)").each(function(){var c={allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder"),minimumInputLength:a(this).data("minimum_input_length")?a(this).data("minimum_input_length"):"3",escapeMarkup:function(a){return a},ajax:{url:wc_enhanced_select_params.ajax_url,dataType:"json",quietMillis:250,data:function(b){return{term:b.term,action:"woocommerce_json_search_customers",security:wc_enhanced_select_params.search_customers_nonce,exclude:a(this).data("exclude")}},processResults:function(b){var c=[];return b&&a.each(b,function(a,b){c.push({id:a,text:b})}),{results:c}},cache:!0}};if(c=a.extend(c,b()),a(this).select2(c).addClass("enhanced"),a(this).data("sortable")){var d=a(this),e=a(this).next(".select2-container").find("ul.select2-selection__rendered");e.sortable({placeholder:"ui-state-highlight select2-selection__choice",forcePlaceholderSize:!0,items:"li:not(.select2-search__field)",tolerance:"pointer",stop:function(){a(e.find(".select2-selection__choice").get().reverse()).each(function(){var b=a(this).data("data").id,c=d.find('option[value="'+b+'"]')[0];d.prepend(c)})}})}})}).on("wc_backbone_modal_before_remove",function(){a(".wc-enhanced-select, :input.wc-product-search, :input.wc-customer-search").filter(".select2-hidden-accessible").select2("close")}).trigger("wc-enhanced-select-init"),a("html").on("click",function(b){this===b.target&&a(".wc-enhanced-select, :input.wc-product-search, :input.wc-customer-search").filter(".select2-hidden-accessible").select2("close")})});
\ No newline at end of file
+jQuery(function(a){function b(){return{language:{errorLoading:function(){return wc_enhanced_select_params.i18n_searching},inputTooLong:function(a){var b=a.input.length-a.maximum;return 1===b?wc_enhanced_select_params.i18n_input_too_long_1:wc_enhanced_select_params.i18n_input_too_long_n.replace("%qty%",b)},inputTooShort:function(a){var b=a.minimum-a.input.length;return 1===b?wc_enhanced_select_params.i18n_input_too_short_1:wc_enhanced_select_params.i18n_input_too_short_n.replace("%qty%",b)},loadingMore:function(){return wc_enhanced_select_params.i18n_load_more},maximumSelected:function(a){return 1===a.maximum?wc_enhanced_select_params.i18n_selection_too_long_1:wc_enhanced_select_params.i18n_selection_too_long_n.replace("%qty%",a.maximum)},noResults:function(){return wc_enhanced_select_params.i18n_no_matches},searching:function(){return wc_enhanced_select_params.i18n_searching}}}}a(document.body).on("wc-enhanced-select-init",function(){a(":input.wc-enhanced-select, :input.chosen_select").filter(":not(.enhanced)").each(function(){var c=a.extend({minimumResultsForSearch:10,allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder")},b());a(this).select2(c).addClass("enhanced")}),a(":input.wc-enhanced-select-nostd, :input.chosen_select_nostd").filter(":not(.enhanced)").each(function(){var c=a.extend({minimumResultsForSearch:10,allowClear:!0,placeholder:a(this).data("placeholder")},b());a(this).select2(c).addClass("enhanced")}),a(":input.wc-product-search").filter(":not(.enhanced)").each(function(){var c={allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder"),minimumInputLength:a(this).data("minimum_input_length")?a(this).data("minimum_input_length"):"3",escapeMarkup:function(a){return a},ajax:{url:wc_enhanced_select_params.ajax_url,dataType:"json",quietMillis:250,data:function(b){return{term:b.term,action:a(this).data("action")||"woocommerce_json_search_products_and_variations",security:wc_enhanced_select_params.search_products_nonce,exclude:a(this).data("exclude"),include:a(this).data("include"),limit:a(this).data("limit")}},processResults:function(b){var c=[];return b&&a.each(b,function(a,b){c.push({id:a,text:b})}),{results:c}},cache:!0}};if(c=a.extend(c,b()),a(this).select2(c).addClass("enhanced"),a(this).data("sortable")){var d=a(this),e=a(this).next(".select2-container").find("ul.select2-selection__rendered");e.sortable({placeholder:"ui-state-highlight select2-selection__choice",forcePlaceholderSize:!0,items:"li:not(.select2-search__field)",tolerance:"pointer",stop:function(){a(e.find(".select2-selection__choice").get().reverse()).each(function(){var b=a(this).data("data").id,c=d.find('option[value="'+b+'"]')[0];d.prepend(c)})}})}}),a(":input.wc-customer-search").filter(":not(.enhanced)").each(function(){var c={allowClear:!!a(this).data("allow_clear"),placeholder:a(this).data("placeholder"),minimumInputLength:a(this).data("minimum_input_length")?a(this).data("minimum_input_length"):"1",escapeMarkup:function(a){return a},ajax:{url:wc_enhanced_select_params.ajax_url,dataType:"json",delay:250,data:function(b){return{term:b.term,action:"woocommerce_json_search_customers",security:wc_enhanced_select_params.search_customers_nonce,exclude:a(this).data("exclude")}},processResults:function(b){var c=[];return b&&a.each(b,function(a,b){c.push({id:a,text:b})}),{results:c}},cache:!0}};if(c=a.extend(c,b()),a(this).select2(c).addClass("enhanced"),a(this).data("sortable")){var d=a(this),e=a(this).next(".select2-container").find("ul.select2-selection__rendered");e.sortable({placeholder:"ui-state-highlight select2-selection__choice",forcePlaceholderSize:!0,items:"li:not(.select2-search__field)",tolerance:"pointer",stop:function(){a(e.find(".select2-selection__choice").get().reverse()).each(function(){var b=a(this).data("data").id,c=d.find('option[value="'+b+'"]')[0];d.prepend(c)})}})}})}).on("wc_backbone_modal_before_remove",function(){a(".wc-enhanced-select, :input.wc-product-search, :input.wc-customer-search").filter(".select2-hidden-accessible").select2("close")}).trigger("wc-enhanced-select-init"),a("html").on("click",function(b){this===b.target&&a(".wc-enhanced-select, :input.wc-product-search, :input.wc-customer-search").filter(".select2-hidden-accessible").select2("close")})});
\ No newline at end of file
diff --git a/includes/class-wc-ajax.php b/includes/class-wc-ajax.php
index 27f821bce6d..55f28c4d05d 100644
--- a/includes/class-wc-ajax.php
+++ b/includes/class-wc-ajax.php
@@ -1229,8 +1229,26 @@ class WC_AJAX {
 			wp_die();
 		}
 
-		$data_store      = WC_Data_Store::load( 'customer' );
-		$ids             = $data_store->search_customers( $term );
+		// Stop if it is not numeric and smaller than 3 characters.
+		if ( ! is_numeric( $term ) && 2 >= strlen( $term ) ) {
+			wp_die();
+		}
+
+		// Search by ID.
+		if ( is_numeric( $term ) ) {
+			$customer = new WC_Customer( intval( $term ) );
+
+			// Customer does not exists.
+			if ( 0 === $customer->get_id() ) {
+				wp_die();
+			}
+
+			$ids = array( $customer->get_id() );
+		} else {
+			$data_store = WC_Data_Store::load( 'customer' );
+			$ids        = $data_store->search_customers( $term );
+		}
+
 		$found_customers = array();
 
 		if ( ! empty( $_GET['exclude'] ) ) {