Rename an attachment file received by email before saving it

[Grosonair]

When saving E-Mails form outlook 365 to Onedrive, it is necessary to ensure unique names, e.g. by adding a Date or some unique prefix in front of the name. ideally, we would have a concatenate function that can be added as prefix to filenames before saving. 

As an alternative, we could use a rename action after saving.