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My iFrame displays login.microsoftonline.com refused to connect - but only SOMETIMES

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Posted on by Chevva

Our D365 app presents an iframe on a form which loads another website (different domain) which conducts some Q and A then returns to a 'completed' page which is a D365 webresource html page.

This works most of the time but occasionally we see 'login.microsoftonline.com refused to connect' and in dev tools the error 'Refused to display 'https://login.microsoftonline.com' in a frame because it set 'x-frame-options' to 'deny'.

I could understand if this happens ALL the time but it doesn't - more often than not, it works! Once I see the error, it persists until I log out/in again.

Following the error, I still appear to be logged in and can happily navigate in D365.

Any suggestions greatly appreciated.

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Bug hunter 7 on at

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RE: My iFrame displays login.microsoftonline.com refused to connect - but only SOMETIMES

Root cause for this issue is, If multiple outlook accounts are logged into a browser,

even after signing out from the accounts,

they are cached by browser, In this case when an application with microsoft login starts from salesforce iframe (only in case of multiple MS accounts) opens a popup to pick an account.

This will get blocked in iframe and further authentication does not happen.

Resolution steps for edge browser.

1) click on profile icon and click on Manage profile settings.

2) Click on 3 dots icon and click on remove button

Happy coding!!
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Naveen Ganeshe 3,393 User Group Leader on at

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RE: My iFrame displays login.microsoftonline.com refused to connect - but only SOMETIMES

Hi Trevor Helps,

This is strange but you can try clearing your browser cache or try changing the "X-frame-options" of that website to some other values. Here is the link for different options that you can try:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
https://credoinfolit.zendesk.com/hc/en-us/articles/360038339213-X-Frame-Options-Set-to-Deny