Exchange mail quota settings must not restrict receiving mail.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-259675 | EX19-MB-000122 | SV-259675r961152_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 2019 Mailbox Server Security Technical Implementation Guide | 2024-08-22 |
Details
| Check Text (C-63414r942337_chk) |
| Open the Exchange Management Shell and enter the following command: Get-MailboxDatabase | Select-Object -Property 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-63322r942338_fix) |
| Open the Exchange Management Shell and enter the following command: Set-MailboxDatabase -Identity <'IdentityName'> -ProhibitSendReceiveQuota Unlimited Note: The <IdentityName> value must be in quotes. or Enter the value as identified by the EDSP that has obtained a signoff with risk acceptance. |