Requests to https://analytics.dev.azure.com/XYZ/XYZ/_odata/v4.0-preview/Iterations?$select=IterationSK gets blocked

Oechslein, Christoph 20 Reputation points
2026-08-31T14:37:01.5433333+00:00

Since a couple of hours the working access to e.g. "https://analytics.dev.azure.com/XYZ/XYZ/_odata/v4.0-preview/Iterations?$select=IterationSK" (XYZ replaced due to privacy) gets blocked with a "The request is blocked.".

Even this shortened URL gets blocked "https://analytics.dev.azure.com/?$select":

Screenshot

Looks like the "$select" is the "problem" here, maybe a misconfigured WAF?

Azure DevOps
Answer accepted by question author
Allan Solomon Mejia 8,000 Reputation points
2026-08-31T15:31:56.71+00:00

Hello @Oechslein, Christoph

This does look like a service-side filtering/blocking issue rather than an invalid OData query.

Microsoft's current Azure DevOps Analytics documentation explicitly supports $select with the v4.0-preview endpoint, including queries against Iterations.

For example, Microsoft documents the same pattern:

.../_odata/v4.0-preview/Iterations?$filter=...&$select=IterationSK

So $select=IterationSK itself is valid. More importantly, your test showing that even https://analytics.dev.azure.com/?$select produces “The request is blocked” suggests the request is being rejected before normal OData processing.

Given that this started only a few hours ago, I wouldn't modify working queries to work around it yet. Please also test $filter or $top; if $select specifically triggers the block across different organizations/networks, that would be particularly strong evidence of an Azure DevOps edge/WAF regression.

Report this to Azure DevOps Support with the timestamp, organization/region, failing URL, HTTP status/response headers, and request/correlation ID from browser Developer Tools. The fact that Microsoft's own documented $select syntax is being blocked should make the escalation fairly clear.

Reference: Microsoft - Define basic OData Analytics queries

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  1. Oechslein, Christoph 20 Reputation points
    2026-08-31T15:44:18.71+00:00

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  2. TP 163.1K Reputation points Volunteer Moderator
    2026-08-31T17:09:51.2733333+00:00

    Hi,

    UPDATE: They have fully mitigated the issue. Please confirm it is working for you now.

    Excerpt from Availability Degradation of multiple services event

    Final update

    Birendra Acharya, 8/31/2026, 3:56 PM EDT

    The issue is now fully mitigated. Our engineers will be investigating this further to learn from and reduce the risk of potential recurrences. We apologize for the impact this had on our customers.

    Update

    Birendra Acharya, 8/31/2026, 3:22 PM EDT

    We have reverted the change and services are recovering. We will continue to observe the impact and post more updates on status.

    Update

    Birendra Acharya, 8/31/2026, 2:23 PM EDT

    We have identified the change in configuration which triggered this incident. We are reverting the change and observing impact. Will post more updates on status, root-cause and learnings/repairs from this incident.

    Update

    Birendra Acharya, 8/31/2026, 1:50 PM EDT

    Our engineers are working to understand and mitigate the issue.

    Initial communication

    Azure DevOps Incident Scout, 8/31/2026, 12:09 PM EDT

    Our engineers are currently investigating an event impacting Azure DevOps. The event is being triaged and we will post an update as soon as we know more.

    There is a current issue that is being investigated, initial communication below:

    Initial communication

    Birendra Acharya, 8/31/2026, 12:48 PM EDT

    Our engineers are currently investigating an event impacting Azure DevOps. The event is being triaged and we will post an update as soon as we know more.

    Please view below link for details and ongoing updates:

    Availability Degradation- Analytics feature

    https://status.dev.azure.com/_event/860234565

    Additionally, there are several other issues, please see below for list:

    https://status.dev.azure.com/

    Thanks.

    -TP

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