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Portal Issue - Attachment extension failed whitelist policy

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Hello everyone,

We're using D365 CRM Online with Dynamics Portal online. Challenge what we're facing is on the attachment of the files? If we're attaching any images or pdf then all works fine. But, if we attach *.doc, *.xls or *.xml files as attachment, then we're getting exception 'Attachment extension failed whitelist policy'.

We verified at Admin - System Settings - Set blocked file extensions for attachments and .doc, .xls or .xml is not part of it. If we manually add these extension files in D365 records it get attached perfectly.

Your input is appreciated. Thanks. @OliverRodrigues @hardikv

Following is the configuration:

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Power Apps portals

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oliver.rodrigues 9,368 Most Valuable Professional on at

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Hi @Anonymous

From what you are describing your configuration looks correct, and you shouldn't be getting that message.
By any chance would you have any plugin or anything associated against the annotation entity that could be causing this issue?
Have you also tried uploading those file types via D365 to make sure it is working fine there?

I would recommend opening a support ticket for Microsoft so they can investigate what's happening with your environment.

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Community Power Pla... on at

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Hi @OliverRodrigues

Thanks for the input and pointing into the correct direction.

There is an extra Plugin written which is stopping it to proceed. Cheers!

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