This PowerShell script checks for Azure Active Directory (AzureAD) SAML and AzureAD applications whose secrets or certificates are about to expire. It aims to provide a reminder, set by default to 60 days before the expiration date, by sending an email notification containing the details of the expiring entries.

Below is an example of the email notification sent by the script:

Subject: AzureAD Expiration Reminder

SAML Application Name: ExampleSAMLApp
Key ID: 12345678-abcd-1234-ef00-123456abcdef
Start Date: 2022-01-01 12:00:00
Expiration Date: 2023-01-01 12:00:00

AzureAD Application Name: ExampleAzureApp
Key ID: 23456789-bcde-2345-fg01-234567bcdefg
Start Date: 2022-02-01 12:00:00
Expiration Date: 2023-02-01 12:00:00

Before running the script, ensure you have the required permissions to access the AzureAD applications and their secrets/certificates. The script uses the AzureAD PowerShell module, which can be installed by running the following command:

Install-Module -Name AzureAD

Before running the script, some variables need to be customized to fit your environment. This includes SMTP configurations for sending emails, as well as the option to authenticate with AzureAD using a certificate for enhanced security (WIP).

1. SMTP Settings: The script uses SMTP to send out email notifications. You must provide valid SMTP server details that the script will use to send these emails.

2. AzureAD Connection (optional / WIP): By default, the script connects to AzureAD using an interactive login. For automated scenarios, such as running the script as a scheduled task, certificate-based authentication can instead be used. This requires uncommenting and configuring the relevant section with your AzureAD tenant ID, application ID, and certificate thumbprint.

Below is a detailed explanation of the variables you will need to adjust:

The Send-Notification function is responsible for sending the email. Depending on your SMTP server's configuration, you might need to adjust the -UseSsl parameter or provide additional authentication details.

To run the script:

1. Open PowerShell.
2. Navigate to the directory containing the script.
3. Execute the script by running ./AzureAd-Entries.ps1.

If using SMTP authentication ($useSmtpAuth = $true), ensure you secure the script, particularly the $smtpPassword, appropriately. Storing passwords in plaintext in scripts is not recommended for production environments.

Feel free to contribute to the script by suggesting improvements or reporting issues.