Start with the right checks.
Work and school recovery depends on what the organization has enabled. The route available to a personal Microsoft account may not apply.
What to do next.
Check the account address and keep the exact error.
Use the organization’s approved sign in and password reset process.
Complete a verification method you have registered if the provider offers it.
If self service recovery is unavailable, contact the organization’s administrator through a known channel.
Check the result.
Confirm access to the business service and that the expected account and files are present. Check a normal application after recovery.
Stop and get help if…
Recovery requires an administrator, a suspicious account change is reported or several users are affected. Preserve the details rather than repeatedly resetting passwords.