Configuring token expiration times in Azure Logic Apps involves understanding how access tokens and refresh tokens work within the OAuth 2.0 framework. Here's a step-by-step guide on how to manage token expiration:
Understanding Token Lifetimes
- Access Tokens: These are short-lived tokens used to access protected resources. They typically expire after 60 to 90 minutes, depending on the client application and tenant settings[6]. You cannot directly extend their lifetime but can use refresh tokens to obtain new access tokens when needed.
- Refresh Tokens: These are used to obtain new access tokens when the existing ones expire. Refresh tokens have a longer lifetime, typically 90 days by default[5].
Configuring Token Expiration in Azure Logic Apps
1. Use Refresh Tokens:
- When you set up OAuth 2.0 in your Logic App, ensure you configure both access and refresh tokens. This allows your app to automatically request a new access token when the current one expires[1][3].
2. Implement Token Renewal Logic:
- Create a Logic App action that checks if the access token is about to expire. If so, use the refresh token to obtain a new access token. This can be done by making an HTTP request to the token endpoint with the refresh token[3].
3. Store Tokens Securely:
- Use Azure Key Vault to securely store client IDs, client secrets, and access tokens. This ensures that sensitive information is not exposed and can be easily updated when tokens are refreshed[3].
4. Monitor Token Expiration:
- For client secrets, which expire after a maximum of 24 months, use Logic Apps to monitor their expiration dates and send reminders. This ensures that your application remains functional by updating secrets before they expire[2].
Example Logic for Token Renewal
In your Logic App, you can add a step to check if the access token is about to expire. Hereâs a simplified example of how you might implement this using custom expressions:
1. Check Token Expiration:
- Use a condition to check if the token is about to expire based on its expiration time.
2. Refresh Token:
- If the token is expiring soon, use an HTTP action to send a request to the token endpoint with the refresh token. The request should include the client ID and client secret for authentication.
3. Update Token:
- Store the new access token securely in Key Vault and update any subsequent actions to use the new token.
By implementing these steps, you can effectively manage token expiration in Azure Logic Apps and ensure continuous operation of your workflows.
Citations:
[1] https://devforum.zoom.us/t/access-token-expires-after-one-hour-so-my-logic-app-flowstep-runs-only-one-hour-no-renew/99225
[2] https://community.dynamics.com/blogs/post/?postid=662760c7-e0cc-4ca5-b5e4-80962f9b926f
[3] https://gotoguy.blog/2020/12/05/blog-series-powering-up-your-home-office-lights-part-4-using-logic-apps-to-get-access-token-and-renew-access-token-if-needed/comment-page-1/
[4] https://learnsentinel.blog/2021/12/01/using-logic-apps-and-microsoft-sentinel-to-alert-on-expiring-azure-ad-secrets/
[5] https://learn.microsoft.com/en-us/answers/questions/843346/how-to-change-token-expiration-time-in-azure-porta
[6] https://docs.azure.cn/en-us/entra/identity-platform/configurable-token-lifetimes
[7] https://community.dynamics.com/forums/thread/details/?threadid=0cedd8c8-4382-4f02-9d86-8cfbcaa41c54
[8] https://www.youtube.com/watch?v=vjPihv2CnwA
[9] https://www.restack.io/p/azure-logic-app-bearer-token-answer-cat-ai