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Office365: HOW TO GET TenantId, ClientId and ClientSecret

If you use Microsoft office 365 for email sending. Your company Microsoft admin need to get following settings from Azure AD Application 

  • Directory (Tenant) ID

  • Application (Client) ID

  • Client Secret Value

These three values are required for integrating CLOUDEX TMS with Microsoft Graph using OAuth2.

1️⃣ Sign in to Azure Portal

Open: https://portal.azure.comSign in with a Microsoft 365 Global Admin or Application Administrator account.

2️⃣ Open “Microsoft Entra ID” (Azure AD)

Left menu → Microsoft Entra ID
(or search “Entra ID” in the top search bar)

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3️⃣ Create a new App Registration

  1. Left menu: App registrations

  2. Click New registration

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Fill the form:
Field Value
Name CLOUDEX TMS Email Integration (or any name)
Supported account types ✔️ Accounts in any organizational directory (multitenant)
Redirect URI

Select Web → Enter your redirect: 
https://my.cloudex.app/YourCompanyCode/Services/Office365Callback.aspx

 

1) Replace YourCompanyCode with your web app CompanyCode 

2) Redirect URL is case-sensitive

Click Register.

4️⃣ Get the Tenant ID and Client ID

After creation, you will be redirected to the app’s Overview page.
Here you will see:
✔ Directory (Tenant) ID
✔ Application (Client) ID

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Copy them and save.

You already have 2/3 values.

5️⃣ Create Client Secret

Side menu → Certificates & secrets

  1. Click New client secret

  2. Enter a name: CLOUDEX Secret

  3. Choose expiration:

    • 6 months (not recommended)

    • 12 months

    • 24 months (recommended)

    • Or “Custom”

  4. Click Add

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IMPORTANT ⚠️

Copy the Client Secret VALUE immediately.
You will never be able to see it again later.

Store it securely (Azure Key Vault, password manager, etc).

Now you have:

  • ClientId

  • TenantId

  • ClientSecret Value

6️⃣ Add Required API Permissions

Side menu → API permissions

Click:

  • Add a permission

  • Microsoft Graph

  • Delegated permissions

Search + select:

✔ Mail.Send
✔ User.Read
✔ offline_access

Then click Add permissions.

Then click Grant admin consent.

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7️⃣ Final Check: Authentication Settings

Side menu → Authentication

Ensure:

✔ Your redirect URI is correct
✔ “Allow public client flows” is OFF
✔ “Access tokens” and “ID tokens” are ON

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🎉 DONE — Values ready to use

You now have everything:

Parameter Where to find it
TenantId App → Overview → Directory (tenant) ID
ClientId App → Overview → Application (client) ID
ClientSecret App → Certificates & Secrets → Value
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