When you attach a file in a cloud location such as OneDrive, Outlook will send your recipients a link to the file. Permission to access the file is granted automatically to every recipient. This makes sharing easy because you don't have to worry about attachments being blocked.
Step 1: In Outlook, create a message.
Tips: For an existing message, click Reply, Reply All, or Forward.
Step 2: On the ribbon, click Attach File, and choose Browse Web Locations.
Step 3: Choose OneDrive, the file you want to attach, and then choose Insert.
Step 4: In your email message, choose the down arrow for the attachment.
Step 5: Choose Change Permissions, and then choose one of the following:
- Recipients can Edit if you want recipients to be able to modify the file.
- Recipients can View, the default option, if you want recipients to be able to read, but not modify, the file.