如果不在用户级别做配额限制，那默认将遵从数据库级别的配额设置
用户级别：
默认有三个配额选项可以设置，具体每个选项代表什么意思，请仔细阅读下面图片的提示信息
Powershell方式设置单个用户配额限制
设置
Set-Mailbox -Identity zengchuixin -IssueWarningQuota 20GB -ProhibitSendQuota 21GB -ProhibitSendReceiveQuota 22GB
查看
Get-Mailbox -Identity zengchuixin | fl name,issuewarningquota,prohibitsendquota,prohibitsendreceivequota
powershell方式设置数据库配额限制
设置
Set-MailboxDatabase test -IssueWarningQuota 10GB -ProhibitSendQuota 11GB -ProhibitSendReceiveQuota 12GB
查看
Get-MailboxDatabase -Identity test | fl name,issuewarningquota,prohibitsendquota,prohibitsendreceivequota