I'm trying to set a delegate for a mailbox via powershell in Exchange Online (Office 365), but the delegated user does not receive the "Meeting Accepted" messages. I've tested it with my account, and I don't get the meeting accept messages.

I've read that the ResourceDelegates parameter for Get-CalendarProcessing is only for resource mailboxes, yet when I set the delegate as Editor on the Calendar and give them GrantSendonBehalfTo, it updates the ResourceDelegates to that user. 

All of that aside, the fact that I got this to work before but I can't now is driving me absolutely insane. I know that you can set the delegate within Outlook, and then set it to forward the meeting messages to the delegate, but I can't seem to get it to work via powershell. Help?

Please post the complete command you are entering and the complete error message you are receiving.

Also please note that this is an Exchange Server forum.  The set of PowerShell cmdlets in Exchange 2013 vary significantly from Exchange 2013.  For that reason, I recommend that you post this in the Exchange Online (Office 365) Forum: http://social.technet.microsoft.com/Forums/en-US/onlineservicesexchange/threads

Hi,

As Ed suggested, actually, we have a dedicated support team regarding the Microsoft Office 365. I recommend you ask your question on our Office 365 forum which is staffed by more experts specializing in this kind of problems. Thanks for your understanding.

If you have any problem with Exchange server, welcome to our Exchange server forum.

Hope it helps.

Best regards,