Exchange 2013/2016 Monitoring Mailboxes Management

执行 全球通讯簿 和 离线地址簿更新的时候，你可能会发现：

“WARNING: The object DOMAINNAME/Microsoft Exchange System Objects/Monitoring Mailboxes/”Health_Mailbox_GUID” has been corrupted, and it’s in an inconsistent state. The following validation errors happened: WARNING: Database is mandatory or UserMailbox.”

由于关联了空的邮箱数据库（数据库被删除或者服务器被替换），HealthMailboxes变得无效。
当你执行命令Get-Mailbox -Monitoring，你会从一个或者多个HealthMailboxes接受到如下告警，你有了一个无效的HealthMailboxes.

列出组织中存在的所有监视邮箱：
　　Get-Mailbox -Monitoring

      Get-Mailbox -Monitoring | ft displayname，whencreated

 列出数据库中存在的监视邮箱：
      Get-Mailbox -Monitoring -Database <数据库名称>

　　使用以下命令列出与特定服务器关联的监视邮箱：
　　Get-Mailbox -Monitoring | ？{$ _.DisplayName -like“ - <servername> - ”}
　　例：
　　Get-Mailbox -Monitoring | ？{$ _.DisplayName -like“ -exch3- ”} | ft name，displayname，database

使用以下命令列出与特定数据库关联的监视邮箱：
　　Get-Mailbox -Monitoring | ？{$ _.DisplayName -like“* - <数据库名称>”}
　　例：
　　Get-Mailbox -Monitoring | ？{$ _.DisplayName -like“* -db2exch3”} | ft name，displayname，database，servername

https://techcommunity.microsoft.com/t5/exchange-team-blog/exchange-2013-2016-monitoring-mailboxes/ba-p/611004

监视邮箱的命名规则：

Database Health mailbox is now HealthMailbox+Servername+DatabaseName

“HealthMailbox-”+服务器的主机名+“ - ”+数据库名称。

CAS Health Mailboxes are now HealthMailbox+ServerName+001-010 (remember, 10 per CAS role):

“HealthMailbox-”+ CAS服务器的主机名+“ - 001”到“010”。

https://docs.microsoft.com/zh-cn/archive/blogs/admoore/exchange-2013-health-mailboxes

Best practices for monitoring Maibox

Here are some best practices regarding management of user accounts associated with monitoring mailboxes as well as mailboxes themselves:

• Do not apply third party customized password policies to user accounts of monitoring mailboxes
• Exclude monitoring mailboxes from user account lockout policies
• Do not move the user accounts out from the Monitoring Mailboxes container
• Do not change the user account properties, like restricting password change etc.
• Do not change AD permission inheritance
• Since HM worker handles password resets for monitoring mailboxes, in a large environment, it is normal to see increased password reset traffic for monitoring mailbox accounts; note that doing one of the things above might increase the frequency of those resets
• Do not move the monitoring mailboxes between mailbox databases
• Do not apply mailbox quotas to monitoring mailboxes
• If applying a retention policy, ensure the data within the monitoring mailbox is retained for a minimum of 30 days before being deleted