I have many worksheets stretching back several years with cells containing hyperlinks to PDF documents. Those documents are held on my OneDrive account. The links were created to point to the local version of the files (sync app is functioning correctly) However those links now point to the SharePoint version, prompting me to log in to my M365 account. No changes have been made to the workbooks themselves (there are too many for that to have been done manually) so it would seem it is a setting in OneDrive or the Sync app - thoughts anyone?