Someone needs to fix a spreadsheet or help adjust an application setting. That does not automatically require the full account password. Many tasks can be handled through one file share, a limited role, or an observed session. The important steps are defining the task beforehand and ending access deliberately when it is complete.
Derive access from the task
Describe the intended result, such as checking a formula in one workbook. A copy containing harmless sample data may be sufficient. If the original is needed, share that file or an appropriately limited folder. The entire account is rarely the smallest useful unit.
Choose the offered role deliberately. Viewing, commenting, and editing have different consequences. Check whether the helper can share further and whether group or parent-folder permissions grant broader access. A narrow task description does little if the technical permission is much wider.
A spreadsheet correction using sample data
If a formula produces incorrect results, the helper may need only a few representative rows and the affected calculation. Make a copy, replace confidential information with suitable test values, and verify that the error still occurs. The values must preserve the relevant situation; oversimplifying the sheet can accidentally remove the problem.
Ask for the correction to be explained and apply it carefully to the original file. Test several different cases there before considering the change complete. This approach can reduce the required data access while helping you understand why the solution works. The original information remains under your own control.
Verify the person before remote help
Screen sharing or remote control may expose more than the intended application. Close personal windows and consider notifications. Start such sessions only with someone whose identity and task have been established through a known route. An unexpected call claiming your computer has a problem is not sufficient reason.
Microsoft emphasizes trusting the helper and ending suspicious remote-assistance sessions. Stay present and ask for the steps to be explained. Do not hand over sign-in codes or complete secrets when you can perform the required authentication yourself.
Plan completion and revocation
Agree on what counts as completion and inspect the result together. Remove file permissions or temporary roles that are no longer required. End a remote session through its intended controls and check whether any persistent access was configured.
Revoking a share does not erase downloaded copies. Agree on how working copies should be handled after completion. If a password was shared, treat it as exposed and replace it through the official account route. A limited, revocable method will be easier to control for future assistance.