Microsoft 365 mailbox scan

ESET Mail Security offers scanning functionality for Microsoft 365 hybrid Exchange environments (on-premises and cloud) as well as remote mailboxes outside of a hybrid environment without connecting to your local Active Directory. With hybrid Exchange environments, ESET Mail Security supports routing scenarios for both on-premises and cloud environments through Exchange Online or an on-premises organization. For more details, see Transport routing in Exchange hybrid deployments. With remote mailboxes outside of a hybrid environment, Microsoft 365 mailbox scan supports only one tenant. If you want to scan remote mailboxes belonging to another tenant, you can re-register at any time with a different account.

To activate this feature, register ESET Mail Security scanner.

You can scan Microsoft 365 remote mailboxes and Public folders (applies to hybrid Exchange environments) the same way you would with a traditional Mailbox database scan.

The following Microsoft 365 mailbox scan window applies to cloud mailboxes outside of a hybrid environment (no local Active Directory connection). You can make selections based on groups or specific mailboxes. Scanning of Public folders is not supported in this mode.

Running a full email database scan in a large environment can result in undesired system loads. To avoid this issue, run a scan on specific databases or mailboxes. To further minimize system impact, use the time filter at the top of the window. For example, instead of using Scan all messages, you can select Scan messages modified within last week.

We recommend that you configure Microsoft 365. Press the F5 key and click Scans > Mailbox database scan. Also, see the Database scan account details.

To see the Office 365 mailbox scan activity, check Log files > Mailbox database scan.