we are getting app proxy error is there any outage from Microsoft?

Question

we are getting app proxy error is there any outage from Microsoft?

ADMIn-India 5

we are getting app proxy error is there any outage from Microsoft? what is the reason behind this error? is anyone facing this kind issue.? how to resolve theis issue.
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Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-01T18:00:43.1166667+00:00

Hello ADMIn-India

Thank you for sharing the details will check internally and update you!
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-03T17:28:24.9366667+00:00

Hello ADMIn-India

Rather than a Microsoft outage, the Azure AD Application Proxy issue 429 (Too Many Requests) is usually caused by throttling owing to high request volume exceeding the connection or service limits. This happens when the Application Proxy or connector group is unable to manage the incoming traffic, frequently as a result of usage spikes, a lack of connections, or the application's repeated retry calls.

Although you can verify by looking at Microsoft Service Health, this is often a tenant-specific issue and not a worldwide service disruption. In order to fix it, you should implement appropriate retry logic with backoff, **scale out the connector group by adding more connectors, avoid excessive or repetitive queries, and make sure connector servers are not resource constrained.

Overall, this issue is expected behavior under load and can be mitigated by improving capacity and request handling.
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-07T04:37:45.2766667+00:00

Hello ADMIn-India Please confirm whether your issue is resolved or still facing any errors.
Erik P 0 Reputation points

2026-04-07T08:38:46.27+00:00

Same issue here, some microsoft app proxy servers are down since last week. Please investigate
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-10T06:11:24.6566667+00:00

Hello ADMIn-India Please confirm whether your issue is resolved or still facing any errors.

1 answer

Your answer

Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-01T18:00:43.1166667+00:00

Hello ADMIn-India

Thank you for sharing the details will check internally and update you!
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-03T17:28:24.9366667+00:00

Hello ADMIn-India

Rather than a Microsoft outage, the Azure AD Application Proxy issue 429 (Too Many Requests) is usually caused by throttling owing to high request volume exceeding the connection or service limits. This happens when the Application Proxy or connector group is unable to manage the incoming traffic, frequently as a result of usage spikes, a lack of connections, or the application's repeated retry calls.

Although you can verify by looking at Microsoft Service Health, this is often a tenant-specific issue and not a worldwide service disruption. In order to fix it, you should implement appropriate retry logic with backoff, **scale out the connector group by adding more connectors, avoid excessive or repetitive queries, and make sure connector servers are not resource constrained.

Overall, this issue is expected behavior under load and can be mitigated by improving capacity and request handling.
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-07T04:37:45.2766667+00:00

Hello ADMIn-India Please confirm whether your issue is resolved or still facing any errors.
Erik P 0 Reputation points

2026-04-07T08:38:46.27+00:00

Same issue here, some microsoft app proxy servers are down since last week. Please investigate
Rukmini 35,485 Reputation points Microsoft External Staff Moderator

2026-04-10T06:11:24.6566667+00:00

Hello ADMIn-India Please confirm whether your issue is resolved or still facing any errors.

Answer 1

The error page in the screenshot is an Azure AD/Microsoft Entra Application Proxy message with HTTP status code 429 “Too many requests.” This indicates that the Application Proxy service is throttling requests because the allowed transactions per second for the Application Proxy service have been exceeded for that app/connector group.

This is not necessarily a Microsoft-wide outage; it is typically caused by high request volume from the tenant or connector group. The built‑in guidance on the page is:

Review the estimated total transactions per second to ensure they are below the allowed limit for Application Proxy.
Ensure there is more than one connector in the connector group to provide high availability and distribute load.

To proceed:

Reduce burst traffic to the published app (for example, stagger automated calls or health checks).
Add additional private network connectors to the same connector group so load is shared.
Monitor connector health and logs as described in the Application Proxy troubleshooting guidance to confirm that connectors are running and not overloaded.

If the issue persists even at low traffic levels, check the Microsoft 365 Service Health dashboard in the admin portal to see whether there is an active incident for Microsoft Entra Application Proxy.

References:

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we are getting app proxy error is there any outage from Microsoft?

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