When I am sending an email, I would prefer it to automatically default to my computer files, not OneDrive files.
Norman Irwin commented
Put in a way to turn off One Drive for attachments, so clients can open files that were sent to them without needing a password. This is very frustrating to our clients when they can't open attachments. Most of them can barely navigate an email box and when things become to difficult they get upset.
Please make it easier to add attachments without trying to force One Drive down everyone's throats. I will never be attaching from One Drive so, at the very least, provide a way for me to disable this and go straight to the file selection/upload dialog. Adding an attachment to an email should be a single click, not 5 clicks. Thanks.