Outlook.com upload limits
Current source-checked limits for Outlook.com. These rows are staged because the official sources did not state policy effective dates.
Short answer
25 MB attachment limit in Outlook.com
Outlook limits can vary by product and administrator policy. Verify the exact account or tenant before relying on this row.
Rows
Consumer account
Outlook.com attachment
25 MB attachment limit in Outlook.com
- Source checked
- 2026-06-29
- Effective date
- Not stated by source
- Duration / resolution
- Not stated in this row
- Confidence
- official-with-caveat; verified:false
Microsoft 365 / Exchange configured
Outlook desktop attachment
20 MB default Outlook internet account attachment limit
- Source checked
- 2026-06-29
- Effective date
- Not stated by source
- Duration / resolution
- Not stated in this row
- Confidence
- official-with-caveat; verified:false
Nearby platforms
This staged dataset records platform upload limits from official source pages checked on 2026-06-29. Rows are not marked verified because the official sources did not state a policy effective date; always re-check the official source and in-product upload prompt before publishing or sending media.