We already have SharePoint sites set up, which we have linked to Teams.
We created a link to a file (e.g. Excel) with editing rights, and then used insert weblink to add the new document as a tab in a channel. Even when we are working inside the organisation (so are automatically logged into Office 365 with SSO), we are asked to enter our login details to view the documents. After logging in, the documents open in a new browser window, rather than display in Teams.
Is there a different way we should be adding documents in SharePoint as tabs in channels, or is this a problem that needs addressing?