Exchange 2016 using Outlook 2016 client
Created a new Public Folder titled
Mail-enabled the public folder:
Enable-MailPublicFolder -Identity "\PublicFolder"
Added Send As permissions.
Add-ADPermission PublicFolder -User domain\jsmith -Extendedrights "Send As"
Added permissions to receive mail.
Add-PublicFolderClientPermission -identity "\PublicFolder" -User Anonymous -AccessRights CreateItems
Set Hidden from address lists false:
Enable-MailPublicFolder -Identity "\PublicFolder" -HiddenFromAddressListsEnabled $False
The user jsmith is an owner of this public folder. He can add the public folder and the public folder can receive emails but nobody is able to "Send As" the public folder.
Under EAC I have verified that the public folder exists, permissions are in place, and the folder is mail-enabled.
I have tried disabling Mail Settings and re-enabling. I am also completely unable to select "PublicFolder" in my "From" field in OWA. It gives no option to enter a custom name and also doesn't have an option for the PublicFolder. I did add it to my Favorites.
The user receives the message "This message could not be sent. Try sending the message again later, or contact your network administrator. You do not have the permission to send the message on behalf of the specified user. Error is [0x80070005-0x0004dc-0x000524]."
The user has both Send As and Send on Behalf Of permissions.
The issue has lasted more than 24 hours so I am fairly certain that it is not a replication issue.
"The user has both Send As and Send on Behalf Of permissions. "
First, you need to set one or the other. Not both. Therefore remove one.
Does the public folder appear in the GAL? If so, that is how you populate the From field. You cannot just type the address in. If it doesn't appear in the GAL then you need to wait for it to do so. Outlook in cached mode will use the OAB, so you could force the OAB to update
get-offlineaddressbook | update-offlineaddressbook
Wait half an hour then force the client to download the OAB from the Send/Receive menu.
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