Feature request: Suppress Discovery Search Mailbox warning in VDC for Microsoft 365

[benkoch50]

Hi Veeam Team,

I would like to request a product improvement for Veeam Data Cloud for Microsoft 365.

Our “Entire-Organization-Backup-Policy” repeatedly completes as Partial Success because of the Microsoft-managed “Discovery Search Mailbox”.

The backup result shows:
Partial Success (1122/1123)

The failed object is:
Discovery Search Mailbox

The error is:
Processing mailbox failed with error: Cannot find the primary SMTP address for the mailbox.

Veeam Support confirmed under case #08113849 that this is expected behaviour because Discovery Search Mailbox is a Microsoft-managed system mailbox used for eDiscovery and content searches. It contains no user data and has no email address attached. Support also confirmed that all real mailboxes, OneDrive and SharePoint sites are backed up and protected.

The issue is that this still causes the backup policy to show Partial Success every day. As a result, we need to manually check the logs to confirm whether the warning is only this known harmless system mailbox, or whether there is a new genuine backup issue.

Could Veeam please consider adding a way to suppress or ignore this specific expected warning?

Possible options could include:

* Excluding Microsoft system mailboxes such as Discovery Search Mailbox by object type
* Excluding by ExchangeGuid
* Excluding by RecipientTypeDetails, such as DiscoveryMailbox
* Allowing warnings for known system objects with no SMTP address to be marked as ignored or acknowledged
* Separating expected Microsoft system-object warnings from genuine backup warnings

This would allow backup notifications to remain useful without daily false-positive Partial Success alerts.

Thank you.

[Polina]

Hi Ben!

Thanks for reporting. We'll look into it.