Harbour ITMenu

Powered by Office Sentry 2.3.0

You're in the demo. Three fictional clients with made-up people. Look around freely: nothing can be changed, and it all resets every night.Get Office Sentry
Clients/Contoso Legal LLP

Contoso Legal LLP

contoso.onmicrosoft.com

Mailbox size trend

How each mailbox has grown over the last one and three months, which will fill up and when, and the tenant's total mailbox size month by month.

All clients
Download PDFXLSX

Mailbox storage over time

0 GB300 GB600 GB20 Jul 202612 Oct 20262026-07-20: 390 GB2026-07-27: 373.1 GB2026-08-03: 390.4 GB2026-08-10: 406.8 GB2026-08-17: 393.3 GB2026-08-24: 413.3 GB2026-08-31: 399 GB2026-09-07: 419 GB2026-09-14: 417 GB2026-09-21: 439.6 GB2026-09-28: 457.9 GB2026-10-05: 479.3 GB2026-10-12: 473.7 GB473.7 GB

Each mailbox now, against Office Sentry's collection from 35 days earlier (2026-09-07), fastest-growing first. 1 mailbox is full or forecast to fill within 90 days at its current rate: turn on the archive (or auto-expanding archiving) or clear old mail before sending stops.

TypeSize now30‑day changeGrowth a monthStops sending atForecast full
User high47.2 GB+3.3 GB+2.8 GB49.5 GB5 Nov 2026
User21.2 GB+2.5 GB+2.2 GB49.5 GB6 Nov 2027
User26.6 GB+2.1 GB+1.8 GB49.5 GB25 Oct 2027
User23.4 GB+2.1 GB+1.8 GB49.5 GB21 Dec 2027
User18.8 GB+2.1 GB+1.8 GB49.5 GB14 Mar 2028
User24.6 GB+2.0 GB+1.7 GB49.5 GB29 Dec 2027
User12.5 GB+1.5 GB+1.3 GB49.5 GB18 Feb 2029
User25.0 GB+1.5 GB+1.3 GB49.5 GB7 May 2028
User45.6 GB+1.4 GB+1.2 GB49.5 GB20 Jan 2027
User26.9 GB+1.3 GB+1.2 GB49.5 GB22 May 2028
User26.6 GB+1.1 GB+934.4 MB49.5 GB2 Nov 2028
User3.0 GB+334.7 MB+286.9 MB49.5 GB2 Jun 2040
User7.5 GB+305.9 MB+262.2 MB49.5 GB4 Apr 2040
User13.1 GB+267.6 MB+229.3 MB49.5 GB21 Feb 2040
User2.1 GB+263.1 MB+225.5 MB49.5 GB10 Jun 2044
User25.1 GB+256.9 MB+220.2 MB49.5 GB9 Feb 2036
User22.3 GB+228.0 MB+195.4 MB49.5 GB1 Jul 2038
Shared44.8 GBNo changeNo change49.5 GB
User28.1 GB49.5 GB
Shared18.9 GBNo changeNo change49.5 GB
Shared6.4 GBNo changeNo change49.5 GB
User4.1 GB49.5 GB
Room102.4 MBNo changeNo change49.5 GB

Total size by month 4

CSV

The tenant's total mailbox size at the last collection of each month.

MonthTotal sizeChange
2026-10473.7 GB+15.8 GB
2026-09457.9 GB+58.9 GB
2026-08399.0 GB+26.0 GB
2026-07373.1 GB

Data from Mailbox size ().