If you don’t have automated signatures on your email account, you may need to add it manually to each device you send email from. If you have a fairly elaborate signature, it’s perhaps easier to copy and paste it from an existing email. This guide uses images from Outlook on iOS but should be very
The Macnamara Blog
If you need to share a document with an external third party, you should do so securely. Sometimes password protecting and emailing the document is not such a good idea (see Why you shouldn’t password protect your Office Documents). You might consider instead giving them temporary access to the folder itself (see How to share
Your guide on how to install Office 365 onto your device
Perhaps you need to collaborate on documents, provide files for the external colleague to download, or even provide a location for them to upload files to your tenancy. If you need to share a folder with people outside of your organisation, you can do this securely with SharePoint.