Compress Video to a 20MB Target for Outlook
Outlook.com documents a 25MB attachment limit, while work and school systems can apply different policies. This preset targets 20MB to leave some margin and processes the video locally.
Outlook attachment limits
Outlook.com documents a 25MB maximum attachment size. Administrators can set different limits for managed mailboxes, so 20MB is a conservative preset rather than the official Outlook.com ceiling.
Sources: Outlook.com sending limits · Reviewed 2026-06-13
Frequently asked questions
- What is Outlook's attachment size limit?
- Outlook.com documents a 25MB attachment limit. Managed Exchange or Microsoft 365 environments may use an administrator-defined limit.