Exchange Mail quota settings must not restrict receiving mail.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-228379 | SRG-APP-000246 | EX16-MB-000310 | SV-228379r879650_rule | 2023-12-18 | 2 |
| Description |
|---|
| Mail quota settings control the maximum sizes of a user’s mailbox and the system’s response if these limits are exceeded. Mailbox data that is not monitored against a quota increases the risk of mail loss due to filled disk space, which can also render the system unavailable. Failure to allow mail receipt may impede users from receiving mission-critical data. |
| ℹ️ Check |
|---|
| Open the Exchange Management Shell and enter the following command: Get-MailboxDatabase | Select Name, Identity, ProhibitSendReceiveQuota If the value of "ProhibitSendReceiveQuota" is not set to "Unlimited", this is a finding. or If the value of "ProhibitSendReceiveQuota" is set to an alternate value and has signoff and risk acceptance in the EDSP, this is not a finding. |
| ✔️ Fix |
|---|
| Open the Exchange Management Shell and enter the following command: Set-MailboxDatabase -Identity <'IdentityName'> -ProhibitSendReceiveQuota Unlimited Note: The <IdentityName> value must be in single quotes. or Enter the value as identified by the EDSP that has obtained a signoff with risk acceptance. |