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Power Pages login issues

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Posted on by ALL_KAPS

Trying to understand if an issue is isolated to us or is more widespread. Anyone else seeing this issue? When trying to access an internal Power Page, users will just spin and spin on the login page. Sometimes, copying the URL and pasting it directly into the browser will work. Sometimes, it does not.

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SamTimothy 10 on at

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We’re seeing similar behavior, but it doesn’t look like a widespread outage.

This usually points to session/auth issues (cookies, caching, or blocked 3rd‑party cookies). The fact that copying the URL sometimes works is a strong indicator it’s session-related.

Worth testing in InPrivate/Incognito or a different network to confirm.

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11manish 3,210 on at

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Because users occasionally succeed by copying and pasting the URL directly, the issue is most likely related to the authentication redirect process, session cookies, or an intermittent Microsoft Entra ID/Power Pages authentication issue, rather than the page itself. If multiple users across different browsers and networks are affected, I would also review the Power Platform Service Health dashboard to determine whether there is a broader service issue impacting Power Pages sign-in.

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Haque 3,590 on at

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Hi @ALL_KAPS,

Can you please inspect browser Network section at that time when users seeing spinning in the page? Can you please post a screen shot of that?

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Valantis 6,656 on at

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Hi @ALL_KAPS,

The spinning login with intermittent success on URL paste is a classic Power Pages auth redirect issue.

here few things to check:

1. Third-party cookie blocking: Power Pages uses .AspNet.Cookies issued after Entra ID authentication. If users' browsers are blocking third-party cookies (Chrome's Privacy Sandbox, Safari ITP), the session cookie isn't set properly and the redirect spins. Check: have affected users disable third-party cookie blocking for the Power Pages domain, or test in a browser with third-party cookies allowed. This is the most common cause of the intermittent behavior you're describing.

2. Conditional Access MFA loop: if a Conditional Access Policy recently added MFA requirements and some users have incomplete MFA registration, they can get stuck in a proofup redirect loop where the login page spins without ever completing. Check Entra ID Sign-in logs for the affected users and look for interrupted sign-in events.

3. Power Pages response type: Power Pages defaults to code id_token (implicit grant), which is deprecated and can behave inconsistently in modern browsers that restrict implicit flow tokens in redirects. If you recently updated any browser policies or if your tenant's Entra app registration was modified, this could explain a sudden change.

4. Restart the site: in Power Pages admin center (admin.powerplatform.com > your site > Manage), restart the site. Authentication setting changes can take minutes and a stale session on the portal host can cause spinning.

Best regards,

Valantis

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ALL_KAPS 9 on at

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There is an issue with version 9.8.5.9. Microsoft downgraded our site version to 9.8.4.5 to resolve the issue and the fix will be applied in the version released in August. Issue is with version 9.8.5x.

For context in settings for anyone wondering what configuration was - the home page is configured for web role permissions and not anyone on the web. External identity provider is Entra ID. Invitation is disabled.

issue - when user clicks a link from Teams or SharePoint, redirect takes them to homepage which requires login to Microsoft. Users logs in/picks account. Immediately takes the user back to pick account. Continues this loops until user gets error that string query is too long.

if user directly types the url into the browser, will login correctly, then if user signs out, it begins the same login loop.

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