https://www.linode.com/community/questions/10219/postmap-error-access-denied-for-mailuser
Postmap Error: Access Denied for mailuser (10219) | Linode Questions
access deniederrorlinodequestions
https://learn.microsoft.com/tr-tr/powershell/module/exchangepowershell/set-mailuser?view=exchange-ps
Set-MailUser (ExchangePowerShell) | Microsoft Learn
You need to be assigned permissions before you can run this cmdlet. Although this article lists all parameters for the cmdlet, you might not have access to...
setmicrosoftlearn