Update connection with Sharepoint: 'the underlying connection was closed'

[PietroFarias]

I am having a serious problem in which I am unable to access any connections made by PowerQuery and Sharepoint files. It keeps showing the message 'the underlying connection was closed, it was not possible to establish a trust relationship'.

Can someone help me?

[Icey]

Hi @PietroFarias ,

Please check if these posts are helpful:

Power Query Sign in, Certificates and Troubleshooting;

Could Not Establish Trust Relationship For The SSL/TLS Secure Channel.

Best regards

Icey

If this post helps, then consider Accepting it as the solution to help other members find it faster.

[PietroFarias]

This link I found interesting but I couldn't do it on Sharepoint Online

Could Not Establish Trust Relationship For The SSL/TLS Secure Channel.

[PietroFarias]

😭somebody?

[edhans]

If it is everything, you should contact your IT SharePoint admin. There could be a service issue, or they made a change to permissions across the tenant that is impacting your connection.

I assume when you type in your login credentials on Office.com it works, but not here, right?

[PietroFarias]

Login to Office.com, works perfectly. I manage the administrative center of the organization and have not made any changes. The only time this error appears is here, in Power Query.