Welcome to our forum!
How did you operate? Could you please provide the detailed operation or a screenshot? (In order to avoid privacy leakage, please remember to hide your personal information. )
Based on my research, i could send a file in Explorer by Share or Send to button, here are the detailed operation:
- Share: Right-click the file you want to send>share. In this case, the default is sent from the administrator account, and the optional recipient can only be within your organization.
- Send to: Right-click the file you want to send(>Show more options)>Send to>Mail Recipient>Outlook mail pop-up interface (may react for a while), In this case, the sender depends on the default account you log in to Outlook, and the recipient can choose from a wider range.
Meanwhile, here are some steps you may want to take:
- Check MAPI Support: The "Send to Mail Recipient" option requires a classic desktop email client with MAPI support, like Office Outlook. It will not work with Store apps like Mail.
- Check Default Mail Client Settings: Settings > Apps > Default apps>Outlook, ensure that Outlook is set as the default email client.
Hope it helps!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our [documentation] to enable e-mail notifications if you want to receive the related email notification for this thread.