Connect to SP Online and exchange files

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Hello Mateusz, what about this kind of exchanging files: https://community.webcon.com/posts/post/adding-attachments-to-onedrive/183 Does that help? There is also another post here in the forum about adding attachments to Google Drive via REST API. I know it's a different platform, but maybe it's the right direction to implement it. I don't have a SharePoint version so I can't test it out.

Hi Mateusz,

you are right, this error message may refer to MFA. Isn't there any chance to create a service account without MFA and without chaning passwords? The IT could even set the password inside Designer Studio, if they want to make sure no one knows it.

I have one other "crazy" workaround in mind. If nothing fancy is done to the attachment binaries you could probably use PowerShell to retrieve the binaries of the attachment, store and store it on the hard drive. If this works you could go down two roads. Storing the file inside SharePoint using CSOM and an App, you need this to circumvent the MFA restriction.
https://www.c-sharpcorner.com/article/connect-to-sharepoint-online-site-with-app-only-authentication/
The other option would be to install Onedrive, sync the SharePoint Library and store the attachment there.
This is only an idea, and I haven't tested any part of it.

Best regards,
Daniel

Hello Guys,

Thanks a lot for your tips. I will try to convince IT to create service account :)

Regards,
Mateusz