Download ActiveSync 4.5 from Official Microsoft Download Center
Jul 15, 2024 · Microsoft ActiveSync 4.5 is the latest sync software release for Windows Mobile-powered devices. ActiveSync provides a great synchronization experience with Windows® …
Exchange ActiveSync | Microsoft Learn
Apr 30, 2025 · Exchange ActiveSync is an Exchange synchronization protocol that's optimized to work together with high-latency and low-bandwidth networks. The protocol, based on HTTP …
Exchange ActiveSync in Exchange Online | Microsoft Learn
Feb 22, 2023 · Exchange ActiveSync is a Microsoft Exchange synchronization protocol that's optimized to work together with high-latency and low-bandwidth networks. The protocol, based …
Exchange ActiveSync policies for managing devices in Office 365
You can use policies you set up in Office 365 to manage any device that uses Exchange ActiveSync to synchronize with your organization’s email, calendar, contacts, and tasks.
Troubleshoot ActiveSync with Exchange Server - Exchange
Jun 25, 2025 · The Exchange ActiveSync organization settings allow administrators the ability to set the default access level for ActiveSync devices. These default settings include Block, …
Enable or disable Exchange ActiveSync access to mailboxes in …
Apr 30, 2025 · Learn how administrators can enable or disable Exchange ActiveSync access to specific mailboxes in Exchange Server 2016 or Exchange Server 2019.
Mobile device can't connect via ActiveSync - Exchange
Jun 25, 2025 · Describes a scenario in which a mobile device can't connect to Exchange Online in Microsoft 365 by using Exchange ActiveSync. Provides a resolution.
Microsoft
Test your connectivity to Microsoft services with this tool, designed for troubleshooting and diagnostics.
Using hybrid Modern Authentication with Outlook for iOS and …
The Exchange ActiveSync (EAS) connection between Exchange Online and the on-premises environment enables synchronization of the users' on-premises data and includes four weeks …
Managing email apps for user mailboxes | Microsoft Learn
May 20, 2024 · This article explains how to enable or disable Exchange ActiveSync, MAPI, and Outlook on the web for a mailbox using the EAC or Exchange Online PowerShell.