Connection to SharePoint online

You probably need to authenticate the mentioned users. If you right-click on the connection name on the left, you should get these options to do that:

You can read more about these users and their purpose in Intelligent Metadata Layer Overview, chapters 4.3 Indexer Authentication and 4.4 Permissions Retriever.

Thanks Joonas, that is what I wasn't doing.

Joonas, we have another question related to SharePoint, we will use this post. 

We have an error when we try to promote a document from SharePoint to M-Files, if we promote the document to the default class "Document" on M-Files, the document is created without problems:

The last image is one document on SharePoint that it's been promoted, so is a new object on M-Files.

When we try to promote a document to a different class (not the default class "document") on M-Files, for example to the class "Financial statements" when we try to save and promote, we got an error "The folder 9 doesn't exist". We don't know which folder "9" this error is talking about. 

Do you have any idea about this error?

Thank you.

I haven't seen this error before, sorry. I suggest that you raise this with our support team (support@m-files.com).