M365 Archive

RM573702 - Microsoft Purview: Data Lifecycle Management-Increase in expansion limit for auto-expanding archive beyond 1.5 TB

Microsoft 365 Roadmap

Summary

Previously, auto-expanding archive mailbox expansion was supported only up to 1.5 TB, after which mailboxes would become inoperative. Archive mailboxes can now automatically expand beyond the 1.5 TB limit, ensuring uninterrupted retention and enabling scalable archive growth as storage thresholds are reached. This capability to expand archives beyond 1.5 TB will be available to customers with eligible E5 licenses.

Roadmap ID

573702

View in M365 Roadmap

Published

Oct 6, 2026

Status

In development

Release

General Availability

Platforms

Web

Service

Microsoft Purview

Tag

In development
General Availability
GCC
GCC High
DoD

Cloud

DoD
GCC
GCC High

Description

Previously, auto-expanding archive mailbox expansion was supported only up to 1.5 TB, after which mailboxes would become inoperative. Archive mailboxes can now automatically expand beyond the 1.5 TB limit, ensuring uninterrupted retention and enabling scalable archive growth as storage thresholds are reached. This capability to expand archives beyond 1.5 TB will be available to customers with eligible E5 licenses.

GA date: November CY2026