diff --git a/src/Cli/AzureCliLogin.ts b/src/Cli/AzureCliLogin.ts
index ec557fe6..fc67fbff 100644
--- a/src/Cli/AzureCliLogin.ts
+++ b/src/Cli/AzureCliLogin.ts
@@ -17,6 +17,9 @@ export class AzureCliLogin {
     async login() {
         core.info(`Running Azure CLI Login.`);
         this.azPath = await io.which("az", true);
+        if (!this.azPath) {
+            throw new Error("Azure CLI is not found in the runner.");
+        }
         core.debug(`Azure CLI path: ${this.azPath}`);
 
         let output: string = "";
diff --git a/src/PowerShell/AzPSUtils.ts b/src/PowerShell/AzPSUtils.ts
index 4b287cfd..b9f37884 100644
--- a/src/PowerShell/AzPSUtils.ts
+++ b/src/PowerShell/AzPSUtils.ts
@@ -71,6 +71,9 @@ export class AzPSUtils {
         };
 
         let psPath: string = await io.which(AzPSConstants.PowerShell_CmdName, true);
+        if (!psPath) {
+            throw new Error("PowerShell is not found in the runner.");
+        }
         await exec.exec(`"${psPath}"`, ["-Command", psScript], options)
         if (commandStdErr) {
             throw new Error('Azure PowerShell login failed with errors.');
diff --git a/src/common/Utils.ts b/src/common/Utils.ts
index 9a2734be..adb96d3b 100644
--- a/src/common/Utils.ts
+++ b/src/common/Utils.ts
@@ -14,7 +14,8 @@ export function setUserAgent(): void {
 export async function cleanupAzCLIAccounts(): Promise<void> {
     let azPath = await io.which("az", true);
     if (!azPath) {
-        throw new Error("Azure CLI is not found in the runner.");
+        core.warning("Azure CLI is not found in the runner.");
+        return;
     }
     core.debug(`Azure CLI path: ${azPath}`);
     core.info("Clearing azure cli accounts from the local cache.");
@@ -24,7 +25,8 @@ export async function cleanupAzCLIAccounts(): Promise<void> {
 export async function cleanupAzPSAccounts(): Promise<void> {
     let psPath: string = await io.which(AzPSConstants.PowerShell_CmdName, true);
     if (!psPath) {
-        throw new Error("PowerShell is not found in the runner.");
+        core.warning("PowerShell is not found in the runner.");
+        return;
     }
     core.debug(`PowerShell path: ${psPath}`);
     core.debug("Importing Azure PowerShell module.");