1.以管理员权限打开PowerShell:

Install-Module MsOnline

Import-Module MsOnline

$cred= Get-Credential

$uri= "https://partner.outlook.cn/PowerShell"

$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri $uri -Credential $cred -Authentication Basic -AllowRedirection

Import-PSSession $Session -DisableNameChecking

2.授予管理员导出邮箱权限：

Add-MailboxPermission  -User  gan@nip.com.cn -Identity Admin@nipit.partner.onmschina.cn -Acce***ights FullAccess -InheritanceType All