Forum Discussion
Sharepoint Embedded Paginated Report "Sign In" button does not work
v-prasare burakkaragoz andrewsommer Per Microsoft tech support, embedding PowerBI Report Builder reports (rdl) in Sharepoint is not supported.
It works fine for one customer, doesn't work for the other!
burakkaragoz v-prasare andrewsommer
I was able to solve this issue by adding the "sandbox" tag to the iframe. Now it is working as expected.
burakkaragoz Thank you for your response. Unfortunately the problem persists!
Hi keith_smith1 ,
Thanks for the update, and sorry to hear the issue is still unresolved.
Since the usual fixes didn’t help, here are a few additional steps you might try:
Check Browser Console Logs
Open the browser’s developer tools (F12) and check the Console and Network tabs when clicking the "Sign In" button. Any errors there might give clues (e.g., CORS issues, blocked scripts, auth redirects).Use Incognito/Private Mode
Sometimes extensions or cached sessions interfere. Try accessing the SharePoint page in an incognito/private window.Test with a Different Network or VPN
If your organization uses a proxy, firewall, or VPN, try accessing from a different network to rule out network-level blocks.Check Azure AD Conditional Access Policies
If your tenant has Conditional Access policies, they might be blocking embedded authentication flows. Your IT admin can check this in Azure AD > Security > Conditional Access.Try Embedding via Power BI App Web Part
If you're using a standard embed code, consider switching to the Power BI web part in SharePoint Online, which is designed for better integration and authentication handling.
Let me know if any of these help—or if you can share any console error messages, I’d be happy to help interpret them!
burakkaragoz thank you for more suggestions.
Regarding using the PowerBI Web Part I believe this is only compatible with PowerBI Reports and not Paginated reports.
The console logs have a few things that may be worth investigating.
https://login.microsoftonline.com/organizations/oauth2/v2.0/token
Failed to load resource: the server responded with a status of 400 ()
<Error generated from Report URL>
https://res-1.cdn.office.net/files/odsp-web-prod_2025-04-25.001/spappbarwebpack/spappbarwebpack.js was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.
I will continue testing further and have created a Support ticket for this issue.
burakkaragoz v-prasare andrewsommer
I was able to solve this issue by adding the "sandbox" tag to the iframe. Now it is working as expected.