M365 Changelog: (Updated) Outlook: Choose how many days of emails sync to your iOS or Android device for offline usage

MC696167 – Updated April 23, 2024: Microsoft has updated the rollout timeline below. Thank you for your patience.

With the new sync window, users can choose how many days’ worth of emails and attachments they want to download to their iOS or Android device so they can always access them even while offline.

Note: The emails/attachments will be stored internally as a cache since every time a user changes their sync window (decrease) Microsoft does a clean-up of all saved data. They cannot choose the location for that matter.

This message is associated with Microsoft 365 Roadmap ID: 189809

Preview: Microsoft will begin rolling out in late December 2023 and expects to complete by mid-January 2024.

Standard Release: Microsoft will begin rolling out mid-May 2024 (previously late March) and expects to complete by mid-June 2024 (previously mid-April).

How this will affect your organization:

This change will give users more control over what messages and attachments are being saved to their device. By choosing sync settings that better accommodate their necessities, they can use Outlook Mobile even while they’re not connected to their cellular data or Wi-Fi.

iOS:

View image in new tab

Android:

View image in new tab

What you need to do to prepare:

Update training and documentation as appropriate so users can determine how many days they’d prefer to sync to their device; Microsoft currently provides a 90-day limit.