When you are using Microsoft Office for the web to edit your files, all your edits are automatically saved based on the auto-save frequency defined by Microsoft.

For information about auto-save frequency defined by Microsoft, visit: https://docs.microsoft.com/en-us/microsoft-365/cloud-storage-partner-program/online/scenarios/coauth

NOTE:

  • There is no explicit Save option available when using Microsoft Office for the web. 
  • The auto save frequency cannot be modified.