About Excel 365
The spreadsheet your finance team really plans the year in.
Excel 365 is Microsoft's spreadsheet on the cloud, the subscription edition that lives in your browser and stores its workbooks in OneDrive for Business and SharePoint. The Excel 365 connector talks to those workbooks through the Microsoft Graph workbook API: read worksheets, ranges, tables and named ranges; write rows back into a table; open a session that either persists the change to the file or keeps it scoped to the API call. Auth runs through Microsoft Entra with the standard Files.Read or Files.ReadWrite scopes.
Excel is also the system of record nobody chose but every SMB ends up with. The annual budget gets built in a workbook with a tab per cost centre. The sales forecast gets typed into a forecast file every Friday. The HR headcount plan and the production target sheet live as cells in OneDrive. Pulling that into a warehouse alongside Exact actuals, Salesforce pipeline and Business Central GL turns the file finance has been emailing around into a table the rest of the business can join, version and trust.