1. 首先确保powershell 执行策略
PS C:\Users\administrator.51TALK> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned
PS C:\Users\administrator.51TALK> Get-ExecutionPolicy
RemoteSigned
  1. 写PS脚本 
    
Add-PSSnapin microsoft.exchange*
Import-Module activedirectory  
$dbs= @("bjstaff01","bjoffice","bjstaff02","bjstaff03")
$users= Get-User -OrganizationalUnit "北京"  -RecipientTypeDetails user  
foreach($i in $users){
$db= get-random -InputObject $dbs
Enable-Mailbox -Identity $i -Database $db
}

3. 创建任务计划
![](https://s1.51cto.com/images/blog/201807/27/a1bcedb914feb382214c5d5940477ece.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)