Mail Contacts Hygiene
The question it answers: Which mail contacts are stale, duplicate guests, or point at domains that no longer receive mail?
Mail contacts pile up: partners who changed domain, suppliers who went out of business, people who are now guests as well. They produce wrong address-book entries and bounced replies.
At a glance
Section titled “At a glance”| Where in the app | Exchange Online › Mail Security & Hygiene › Mail Contacts Hygiene |
| Workload | Exchange Online |
| Kind | Findings list · dashboard tile |
| Data | Read from Microsoft 365 when someone first opens it, then kept for the report cache lifetime (Settings > Data & cache, 1 hour unless changed). It reads through PowerShell (Exchange Online or SharePoint Online), so the first load takes longer than a Graph report. |
| Licence | No extra licence needed. |
| Report id (API and MCP) | exchange.hygiene.mail-contacts |
Columns
Section titled “Columns”| Column | Key | Type |
|---|---|---|
| Severity | Severity | Status |
| Issue | Category | Text |
| Contact | Subject | Link |
| Check | Setting | Text |
| External address | Value | Text |
| Finding | Finding | Text |
| Matching guest | Detail | Text |
| Created | When | Date |
| Count | Number | Number |
A findings list hides columns that no row fills. Severity is Critical, Serious, Warning, OK or Info; rows rated Critical, Serious or Warning need attention (Working with findings).
What it needs
Section titled “What it needs”Licence: No extra licence needed.
Application permissions on the IntensiveReports app registration (all permissions):
| Permission | API | What it allows | Note |
|---|---|---|---|
Exchange.ManageAsApp | Office 365 Exchange Online | Manage Exchange As Application | + View-Only Recipients |
User.Read.All | Microsoft Graph | Read all users’ full profiles | guest duplicates |
User-LifeCycleInfo.Read.All | Microsoft Graph | Read all users’ lifecycle information | with |
User.Read.All | Microsoft Graph | Read all users’ full profiles | with |
Data sources it reads
Get-MailContactResolve-DnsName MX per contact domainGET /v1.0/users (guests)
Through the API and MCP
Section titled “Through the API and MCP”GET /ir-api/v1/reports/exchange.hygiene.mail-contacts?size=100An AI assistant reads it with the MCP tool get_report and the id exchange.hygiene.mail-contacts. The client needs the Read grant for Exchange Online. See Using the API.