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How to Fix an Inactive or Soft-Deleted Mailbox in Business Central
Question details
The user needs to resolve an error indicating an inactive or soft-deleted mailbox when attempting to use email features.
- Product
- Microsoft Dynamics 365 Business Central
- Device & OS
- not provided
- Scenario
- Configuring or utilizing email integration and synchronization capabilities within Business Central.
- Observed behavior
- The system reports the mailbox as inactive or soft-deleted, preventing proper email synchronization and connection.
Ensure you have Microsoft 365 administrative privileges, as resolving this issue requires access to the Exchange Admin Center and user licensing settings.
Verify Exchange Online Hosting and User Licensing
Ensure the mailbox is active, properly licensed, and hosted in Exchange Online rather than an on-premises environment.
Business Central requires mailboxes to be hosted in Exchange Online for seamless integration. Connection errors frequently occur if the mailbox has been soft-deleted, lacks an active Exchange Online license, or is mistakenly hosted on an on-premises server.
Log in to the Microsoft 365 Admin Center using an account with global or Exchange administrator privileges.
Navigate to 'Users' > 'Active users', select the user account experiencing the issue, and ensure an active Exchange Online license is assigned under the 'Licenses and apps' tab.
Open the Exchange admin center and verify that the mailbox exists, is fully provisioned, and is explicitly hosted in the cloud (Exchange Online).
Return to Business Central, review the Microsoft 365 connection settings, and ensure the account has the necessary permissions to communicate with the active mailbox.
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Frequently Asked Questions
What does a 'soft-deleted mailbox' mean in Exchange Online?
A soft-deleted mailbox is a mailbox that has been deleted but can still be recovered within a specific retention period (usually 30 days). This typically happens when a Microsoft 365 user account is deleted or when their Exchange Online license is removed.
Can I connect Business Central to an on-premises Exchange server?
Standard email synchronization features in Business Central generally require mailboxes to be hosted natively in Exchange Online to function correctly. On-premises hosting can cause connection or inactive mailbox errors.
Where can I find advanced support for Business Central backend issues?
For highly specific backend configuration or complex integration issues, the Microsoft Dynamics 365 Community forums (community.dynamics.com) are the best place to share your configuration details and receive assistance from certified specialists.
