There is a limit for non-Microsoft Sync Technology based accounts—you can add 15 mail apps to the app and unlimited drive (storage) apps (OneDrive, Box, etc.). We want everyone to be able to have a great experience with Outlook and this helps ensure that!

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Office Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!