The error message "Sorry, another account from your organization is already signed in on this computer." appears when opening an Office document from SharePoint Online: ![][1] Follow these steps to solve the issue: 1. Open Excel on the desktop 2. In the top-right click **Switch Account** then **sign out...
[Clearing the cache can fix a log of issues][1], especially on shared computers, but If you are still having trouble opening Office docs (in particular Excel sheets linked to other sheets and data sources) here are a few ways that may help fix it. NB. It is worth testing your issue on another PC first as this artic...