Fact · Voice privacy and security
548days
Microsoft's default storage period for Copilot conversation activity, 18 months, is about 548 days.
Checked against its source on October 17, 2026
- What it measures
- Microsoft's default storage period for Copilot conversation activity. The number measures the stated default, which you can shorten by deleting conversations.
- How it is calculated
- 18 months x 365 days / 12 months = 547.5, rounded to 548 days