Finding users whom are not using the Default Storage Quotas

There is a very simple way using the Exchange Management Shell that you can find these users and evaluate if they have a legitimate reason to not be subject to the Database limits.

Open an Exchange Management session and type in the following command:

get-mailbox | where {$_.UseDatabaseQuotaDefaults -ne $true}

Open You will be presented with an output similar to that below:

Name                      Alias                ServerName       ProhibitSendQuota

—-                      —–                ———-       —————–

DiscoverySearchMailbox… DiscoverySearchMa… prod-ex2010-01   50 GB (53,687,091,200 bytes)

Alannah.Shaw              Alannah.Shaw         prod-ex2010-01   unlimited

Almaz.Duggan              Almaz.Duggan         prod-ex2010-01   600 MB (629,145,600 bytes)