Reference

Exchange

Rencore Governance inventories 22 object types for Exchange and ships 31 policies and 15 automations.

Inventories

Object Description Properties
Accepted Domain DNS domains the tenant accepts mail for, joined with DKIM signing status. 15
Calendar Permission Permissions configured on Exchange mailbox calendars (sharing and delegation). 15
Distribution Group Exchange-style distribution lists and dynamic distribution lists. Open DLs accepting external mail are a phishing relay risk. 19
Exchange Audit Event Exchange administrative and mailbox audit events ingested from the Office 365 Management Activity API. 17
Exchange Organization Configuration Tenant-wide Exchange Online configuration settings. 19
Exchange Role Assignment Direct RBAC role assignments outside of role groups. Direct assignments bypass role-group governance — auditor blind spot. 14
Exchange Role Group Exchange Online RBAC role groups (Org Management, Recipient Management, etc.). 11
Exchange Security Policy Microsoft Defender for Office 365 / EOP security policies — anti-phish, anti-spam, Safe Links, Safe Attachments, malware filter, outbound spam, and quarantine policies. 42
Journal Rule Exchange journal rules that capture copies of messages to a journal recipient (compliance / legal hold). 12
Mail Contact External recipients in the GAL. Stale contacts pointing at compromised or expired domains are a quiet leak vector. 10
Mail Flow Connector Inbound and outbound mail flow connectors. Misconfigured connectors are a common spoofing / smart-host hijack vector. 20
Mail User Mail-enabled users that route to an external SMTP address. Common offboarding-leak signal. 12
Mailbox Audit Bypass Accounts excluded from mailbox audit logging. Bypassed service accounts can read mail invisibly — high-signal finding most products miss. 11
Mailbox Delegate Mailbox delegations: Full Access, Send-As, and Send-on-Behalf permissions on user mailboxes. 17
Mailbox Folder Permission Per-folder ACLs on user mailboxes (Calendar, Inbox, Top of Information Store). Anonymous calendar sharing is a silent data leak no admin UI surfaces. 18
Redirect Rule All registered Exchange mailbox redirect rules 19
Mobile Device Exchange ActiveSync mobile device partnerships. 20
Mobile Device Policy Exchange ActiveSync mailbox policies controlling device password, encryption, and feature access. 17
Remote Domain Exchange remote domain entries that govern message handling for specific external domains. 14
Resource Mailbox Room and equipment mailboxes with Place metadata and calendar booking policies. 28
Transport Rule Exchange mail flow / transport rules. Top governance signal for BEC and data exfiltration patterns. 21
Mailbox All Exchange mailboxes of your users, rooms & equipment 54

Last updated: 7/19/2026