Storage Growth & Quota Risk

The question it answers: Which mailboxes, SharePoint sites and OneDrives are close to their quota, and how fast is each workload growing?

Which mailboxes, SharePoint sites and OneDrives are close to their quota - a full mailbox stops sending mail, a full site stops accepting files - and how fast each workload is growing across the tenant.

Note

Usage reports lag by up to 48 hours. If report names are concealed in the Microsoft 365 admin centre, names and URLs show as hashes.

At a glance

Where in the app	Tenant › Storage & Quota Risk
Workload	Tenant
Kind	Table
Data	Built from the tenant data IntensiveReports keeps in memory and refreshes in the background, so it opens at once.
Licence	No extra licence needed.
Report id (API and MCP)	tenant.storage.quota-risk

Columns

Column	Key	Type
Name	Name	Link
Workload	Workload	Text
Used	PercentUsed	Status
Used (GB)	UsedGb	Number
Quota (GB)	QuotaGb	Number
Owner	Owner	Text
Detail	Detail	Text
Last activity	LastActivityDate	Date

Filters

Filter	Key (API)	On when the page opens
Mailboxes	mailbox	No
SharePoint sites	sharepoint	No
OneDrives	onedrive	No
Only 75% full or more	risk	Yes

What it needs

Licence: No extra licence needed.

Application permissions on the IntensiveReports app registration (all permissions):

Permission	API	What it allows	Note
Reports.Read.All	Microsoft Graph	Read all usage reports

Data sources it reads

• GET /v1.0/reports/getMailboxUsageDetail, getSharePointSiteUsageDetail, getOneDriveUsageAccountDetail (D30)
• GET /v1.0/reports/getMailboxUsageStorage, getSharePointSiteUsageStorage, getOneDriveUsageStorage (D90)

Through the API and MCP

GET /ir-api/v1/reports/tenant.storage.quota-risk?size=100
GET /ir-api/v1/reports/tenant.storage.quota-risk?filter=risk

An AI assistant reads it with the MCP tool get_report and the id tenant.storage.quota-risk. The client needs the Read grant for Tenant. See Using the API.