Short answer:
When using Send to > Mail Recipient from Office apps, the email is created outside Classic Outlook, so the default email signature is not applied.
Why this happens
In Classic Outlook for Windows, email signatures are added only when emails are created directly in Outlook.
- Office apps (Word, Excel, PowerPoint) generate the email outside Outlook
- Outlook does not control the email creation process
- Therefore, the default signature is not inserted
This is expected behavior by Microsoft: Learn more.
When does this occur?
- Using Send to > Mail Recipient from Word
- Using Send to > Mail Recipient from Excel
- Using Send to > Mail Recipient from PowerPoint
Workarounds
- Create a new email directly in Outlook and attach the file manually
- Insert your signature manually if needed
- Use Xink deployment methods that apply signatures after sending (if configured)
Summary
- Applies to Classic Outlook for Windows
- Emails created outside Outlook do not include signatures
- This is expected Microsoft behavior
- Use Outlook directly to ensure signatures are applied
