Outlook Calendar Credentials Generation Guide

How to Generate Client ID and Secret ID on Azure Portal for Outlook Calendar

Step 1: Sign in to Azure Portal

• Go to: https://portal.azure.com
• Log in using your Microsoft account.

Step 2: Register a New Application

• In the left-hand menu, search for Azure Active Directory and open it.
• In the sidebar under Manage, click App registrations.
• Click + New registration at the top.
• Fill in the form:
  • Name: Your app name (e.g., My Calendar App)
  • Supported account types:
    • Single tenant: Accounts in this organizational directory only
    • Multitenant: Accounts in any organizational directory
    • Multitenant + personal: Include personal Microsoft accounts (e.g., Outlook.com)
  • Redirect URI (optional): Choose Web and enter a URI like:
    http://{your.domain.com}/outlookcalendar/callback
• Click Register.

Step 3: Get Client ID

• After registration, you’ll land on the app’s Overview page.
• Copy the Application (client) ID — this is your Client ID.

Step 4: Generate a Client Secret

• In the left menu, click Certificates & secrets.
• Under Client secrets, click + New client secret.
• Fill in the details:
  • Description: e.g., Calendar Secret
  • Expiry: Select the appropriate expiration (e.g., 6 or 12 months)
• Click Add.
• Copy the secret value immediately — you won’t be able to view it again later.

Step 5: Add Redirect URI (if not added earlier)

• In the left menu, go to Authentication.
• Under Redirect URIs, click Add a platform → choose Web.
• Enter your redirect URI:
  http://{your.domain.com}/outlookcalendar/callback
• Check both Access tokens and ID tokens if using the authorization code flow.
• Click Save.

Step 6: API Permissions

• Go to API permissions.
• Click + Add a permission.
• Select Microsoft Graph.
• Choose Delegated permissions (for acting as the logged-in user).
• Add the following scopes:
  • Calendars.Read
  • Calendars.ReadWrite
  • offline_access (for refresh tokens)
• Click Add permissions.
• If required by your organization, click Grant admin consent.