Last Updated: February 29, 2024
ISSUE
After updating to Version 2401 Build 17231.20182 Outlook stops connecting when using the Exchange ActiveSync (EAS) protocol.
STATUS: FIXED
This issue is fixed in Outlook Desktop Version 2402 Build 17328.20068 and higher. To install the update right away select File > Office Account > Update Options > Update Now.
If you worked around the issue by reverting to the prior build, re-enable updates by selecting File > Office Account > Update Options > Enable Updates.
Workaround:
Revert the Office M365 Click-to-Run installation to Version 2312 Build 17126.20132.
To do this:
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Exit all Office applications.
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Select Start, type cmd in the Search box, right-click Command Prompt (or cmd.exe), and then select Run as administrator.
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In the command prompt dialog window, type the following two command lines, pressing Enter after each command line:
cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
officec2rclient.exe /update user updatetoversion=16.0.17126.20132 -
When the repair is done, open Outlook and select File > Office Account.
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Select Update Options and choose Disable Updates.
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Add an appointment on your calendar for a future date April 1, 2024, to check back to this topic to confirm the issue is fixed. If it is, re-enable updates by selecting File > Office Account > Update Options > Enable Updates.
Additional Resources
Change the Microsoft 365 Apps update channel for devices in your organization
More Resources
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