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Exchange Mail quota settings must not restrict receiving mail.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-228379 | EX16-MB-000310 | SV-228379r612748_rule | Low |
| 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. |
| STIG | Date |
|---|---|
| Microsoft Exchange 2016 Mailbox Server Security Technical Implementation Guide | 2021-03-25 |
Details
| Check Text ( C-30612r496933_chk ) |
|---|
| 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 Text (F-30597r496934_fix) |
|---|
| Open the Exchange Management Shell and enter the following command: Set-MailboxDatabase -Identity <'IdentityName'> -ProhibitSendReceiveQuota Unlimited Note: The or Enter the value as identified by the EDSP that has obtained a signoff with risk acceptance. |