Outlook Error Codes

How to Fix Event ID 300 VersionOverrides Errors in Outlook

Maira Mehtab Sep 22, 2026 869 views

Question details

The user needs to resolve an Event ID 300 error occurring because the VersionOverrides element fails to parse for specific Outlook add-ins.

Product: Microsoft Outlook / Exchange Online
Device & OS: not provided
Scenario: Monitoring application health in Event Viewer or troubleshooting Outlook synchronization and performance issues.
Observed behavior: The Event Viewer logs a Microsoft Office 16 Event ID 300 error (error code 0x8004323E), indicating that the VersionOverrides element failed to parse for the Bing Maps and Suggested Meetings add-ins.

Before you start

Ensure you have Microsoft 365 administrative privileges to execute Exchange Online PowerShell commands, and note that organizational app changes may take some time to propagate.

Solution 1Recommended

Disable Problematic Add-ins Using Exchange Online PowerShell

The most effective method for resolving this organization-wide parsing error is to disable the Bing Maps and Suggested Meetings apps via Exchange Online PowerShell.

By disabling these specific web add-ins at the organizational level, you prevent Outlook from attempting to parse their faulty XML manifests, thereby stopping the Event ID 300 errors.

Connect to Exchange Online

Open PowerShell as an Administrator and execute the command 'Connect-ExchangeOnline' to authenticate with your Microsoft 365 admin credentials.

Identify the Organization Apps

Run the command 'Get-App -OrganizationApp' to locate the specific application identities for the Bing Maps and Suggested Meetings add-ins.

Disable the Add-ins

Execute the command 'Set-App -OrganizationApp -Enabled $false' for both apps, and ensure you set the 'DefaultStateForUser' parameter to 'Disabled'.

Verify the Changes

Allow several days for the configuration changes to fully propagate across the tenant. Afterward, verify the status by running 'Get-App -OrganizationApp' and 'Get-App -Mailbox'.

Propagation Delay: Changes made via Exchange Online PowerShell do not take effect immediately. It can take 24 to 72 hours for add-in settings to apply to all mailboxes.

Solution 2

Manage Web Add-ins via Outlook on the Web

If you prefer a graphical interface or lack PowerShell access, you can manage and remove these web add-ins directly through the Outlook web application.

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Frequently Asked Questions

What causes the Event ID 300 VersionOverrides error in Outlook?

This error, often accompanied by code 0x8004323E, occurs when Outlook fails to parse the XML manifest file for certain web add-ins—most notably Bing Maps and Suggested Meetings—during startup or background synchronization.

Do I need PowerShell to disable the Suggested Meetings add-in?

While using Exchange Online PowerShell is the recommended method for organization-wide deployment and robust management, individual users or admins can also disable web add-ins through the Outlook on the web management interface.

How long does it take for Exchange Online PowerShell changes to apply?

Changes made to organizational apps via PowerShell, such as disabling a problematic add-in, can take anywhere from a few hours to several days to fully propagate to all user mailboxes across your Microsoft 365 tenant.

Will disabling Bing Maps and Suggested Meetings affect Outlook's core functionality?

No, these are optional web add-ins designed to provide contextual location data and meeting suggestions. Disabling them will not impact the core sending, receiving, or scheduling capabilities of Outlook.

Microsoft Office Error Codes