diff --git a/Tasks/Npm/Tests/L0.ts b/Tasks/Npm/Tests/L0.ts
index cd86ed7061a7..bff2dd410996 100644
--- a/Tasks/Npm/Tests/L0.ts
+++ b/Tasks/Npm/Tests/L0.ts
@@ -60,6 +60,20 @@ describe('Npm Task', function () {
     });
 
     // custom
+    it('custom command succeeds with single service endpoint', (done: MochaDone) => {
+        this.timeout(1000);
+        let tp = path.join(__dirname, 'custom-singleEndpoint.js');
+        let tr = new ttm.MockTestRunner(tp);
+
+        tr.run();
+
+        assert(tr.stdOutContained('npm custom successful'), 'npm custom command should have run');
+        assert(tr.stdOutContained('http://example.com/1/'), 'debug output should have contained endpoint');
+        assert(tr.succeeded, 'task should have succeeded');
+
+        done();
+    });
+
     it('custom command should return npm version', (done: MochaDone) => {
         this.timeout(1000);
         let tp = path.join(__dirname, 'custom-version.js');
@@ -132,6 +146,21 @@ describe('Npm Task', function () {
         done();
     });
 
+    it('install using multiple endpoints', (done: MochaDone) => {
+        this.timeout(1000);
+        let tp = path.join(__dirname, 'install-multipleEndpoints.js');
+        let tr = new ttm.MockTestRunner(tp);
+
+        tr.run();
+
+        assert(tr.stdOutContained('npm install successful'), 'npm should have installed the package');
+        assert(tr.stdOutContained('http://example.com/1/'), 'debug output should have contained endpoint');
+        assert(tr.stdOutContained('http://example.com/2/'), 'debug output should have contained endpoint');
+        assert(tr.succeeded, 'task should have succeeded');
+
+        done();
+    });
+
     // publish
     it ('publish using feed', (done: MochaDone) => {
         this.timeout(1000);
diff --git a/Tasks/Npm/Tests/custom-singleEndpoint.ts b/Tasks/Npm/Tests/custom-singleEndpoint.ts
new file mode 100644
index 000000000000..566a5299e478
--- /dev/null
+++ b/Tasks/Npm/Tests/custom-singleEndpoint.ts
@@ -0,0 +1,29 @@
+import * as path from 'path';
+
+import { TaskLibAnswerExecResult } from 'vsts-task-lib/mock-answer';
+import * as tmrm from 'vsts-task-lib/mock-run';
+
+import { NpmCommand, NpmTaskInput, RegistryLocation } from '../constants';
+import { NpmMockHelper } from './NpmMockHelper';
+
+let taskPath = path.join(__dirname, '..', 'npm.js');
+let tmr = new NpmMockHelper(taskPath);
+
+tmr.setInput(NpmTaskInput.Command, NpmCommand.Custom);
+tmr.setInput(NpmTaskInput.CustomCommand, 'mockcmd');
+tmr.setInput(NpmTaskInput.WorkingDir, '');
+tmr.setInput(NpmTaskInput.CustomRegistry, RegistryLocation.Npmrc);
+tmr.setInput(NpmTaskInput.CustomEndpoint, '1');
+let auth = {
+    scheme: 'Token',
+    parameters: {
+        'apitoken': 'AUTHTOKEN'
+    }
+};
+tmr.mockServiceEndpoint('1', 'http://example.com/1/', auth);
+tmr.mockNpmCommand('mockcmd', {
+    code: 0,
+    stdout: 'npm custom successful'
+} as TaskLibAnswerExecResult);
+
+tmr.run();
diff --git a/Tasks/Npm/Tests/install-multipleEndpoints.ts b/Tasks/Npm/Tests/install-multipleEndpoints.ts
new file mode 100644
index 000000000000..5facb8ff3787
--- /dev/null
+++ b/Tasks/Npm/Tests/install-multipleEndpoints.ts
@@ -0,0 +1,29 @@
+import * as path from 'path';
+
+import { TaskLibAnswerExecResult } from 'vsts-task-lib/mock-answer';
+import * as tmrm from 'vsts-task-lib/mock-run';
+
+import { NpmCommand, NpmTaskInput, RegistryLocation } from '../constants';
+import { NpmMockHelper } from './NpmMockHelper';
+
+let taskPath = path.join(__dirname, '..', 'npm.js');
+let tmr = new NpmMockHelper(taskPath);
+
+tmr.setInput(NpmTaskInput.Command, NpmCommand.Install);
+tmr.setInput(NpmTaskInput.WorkingDir, '');
+tmr.setInput(NpmTaskInput.CustomRegistry, RegistryLocation.Npmrc);
+tmr.setInput(NpmTaskInput.CustomEndpoint, '1,2');
+let auth = {
+    scheme: 'Token',
+    parameters: {
+        'apitoken': 'AUTHTOKEN'
+    }
+};
+tmr.mockServiceEndpoint('1', 'http://example.com/1/', auth);
+tmr.mockServiceEndpoint('2', 'http://example.com/2/', auth);
+tmr.mockNpmCommand('install', {
+    code: 0,
+    stdout: 'npm install successful'
+} as TaskLibAnswerExecResult);
+
+tmr.run();
diff --git a/Tasks/Npm/npmcustom.ts b/Tasks/Npm/npmcustom.ts
index 6eccfdce01e3..d8b863a2fa20 100644
--- a/Tasks/Npm/npmcustom.ts
+++ b/Tasks/Npm/npmcustom.ts
@@ -21,9 +21,10 @@ export async function run(command?: string): Promise<void> {
             break;
         case RegistryLocation.Npmrc:
             tl.debug(tl.loc('UseNpmrc'));
-            let endpointId = tl.getInput(NpmTaskInput.CustomEndpoint);
-            if (endpointId) {
-                npmRegistries.push(NpmRegistry.FromServiceEndpoint(endpointId, true));
+            let endpointIds = tl.getDelimitedInput(NpmTaskInput.CustomEndpoint, ',');
+            if (endpointIds && endpointIds.length > 0) {
+                let endpointRegistries = endpointIds.map(e => NpmRegistry.FromServiceEndpoint(e, true));
+                npmRegistries = npmRegistries.concat(endpointRegistries);
             }
             break;
     }
diff --git a/Tasks/Npm/package.json b/Tasks/Npm/package.json
index d9720ae6db6f..fbe52054dc29 100644
--- a/Tasks/Npm/package.json
+++ b/Tasks/Npm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vsts-npm-task",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "VSTS NPM Task",
   "main": "npmtask.js",
   "scripts": {
diff --git a/Tasks/Npm/task.json b/Tasks/Npm/task.json
index eb60fe133e9a..88c9fe5ed592 100644
--- a/Tasks/Npm/task.json
+++ b/Tasks/Npm/task.json
@@ -9,7 +9,7 @@
     "version": {
         "Major": 1,
         "Minor": 0,
-        "Patch": 1
+        "Patch": 2
     },
     "runsOn": [
         "Agent",
@@ -89,7 +89,10 @@
             "label": "Credentials for registries outside this account/collection",
             "helpMarkDown": "Credentials to use for external registries located in the project's .npmrc. For registries in this account/collection, leave this blank; the build’s credentials are used automatically.",
             "type": "connectedService:externalnpmregistry",
-            "visibleRule": "customRegistry = useNpmrc"
+            "visibleRule": "customRegistry = useNpmrc",
+            "properties": {
+                "MultiSelectFlatList": "true"
+            }
         },
         {
             "groupName": "publishRegistries",
diff --git a/Tasks/Npm/task.loc.json b/Tasks/Npm/task.loc.json
index 0d788e9636be..d5c770c0a477 100644
--- a/Tasks/Npm/task.loc.json
+++ b/Tasks/Npm/task.loc.json
@@ -9,7 +9,7 @@
   "version": {
     "Major": 1,
     "Minor": 0,
-    "Patch": 1
+    "Patch": 2
   },
   "runsOn": [
     "Agent",
@@ -89,7 +89,10 @@
       "label": "ms-resource:loc.input.label.customEndpoint",
       "helpMarkDown": "ms-resource:loc.input.help.customEndpoint",
       "type": "connectedService:externalnpmregistry",
-      "visibleRule": "customRegistry = useNpmrc"
+      "visibleRule": "customRegistry = useNpmrc",
+      "properties": {
+        "MultiSelectFlatList": "true"
+      }
     },
     {
       "groupName": "publishRegistries",
diff --git a/Tasks/Npm/util.ts b/Tasks/Npm/util.ts
index 772d34735d42..0b7f4ed1d479 100644
--- a/Tasks/Npm/util.ts
+++ b/Tasks/Npm/util.ts
@@ -79,7 +79,8 @@ export async function getPackagingCollectionUrl(): Promise<string> {
 }
 
 export function getTempNpmrcPath(): string {
-    let tempUserNpmrcPath: string = path.join(getTempPath(), `${tl.getVariable('Build.BuildId')}.npmrc`);
+    let id: string = tl.getVariable('Build.BuildId') || tl.getVariable('Release.ReleaseId');
+    let tempUserNpmrcPath: string = path.join(getTempPath(), `${id}.npmrc`);
 
     return tempUserNpmrcPath;
 }