Since we installed CU10 we have an issue with forwarding mail to another mailbox.
Here is the situation.
I edit the settings of a mailbox in the exchange Admin Center and goto Mailbox Features, Mail flow, View details and tick Enable forwarding and select the user to which the mail must be forwarded and save those settings.
When i send a test email the mailbox i just edited the mail is not forwarded.
I checked in powershell if the Mailboxproperty "ForwardingSmtpAddress" but it was empty which would explain why the message isn't forwarded. If i tick the box "Deliver message to both forwarding address and mailbox" in the Exchange
Admin Center the property "DeliverToMailboxAndForward" is changed to True.
If i want to set the Mailboxproperty "ForwardingSmtpAddress" in Powershell which i already set in EAC i get the message
"WARNING: Before your forwarding settings can take effect, you need to contact your helpdesk and ask them to turn off the forwarding your administrator previously set." in Powershell.
I order to make the function work i have to disable Forwarding in EAC en configure forwarding via Powershell.
Only then the Mailboxproperty "ForwardingSmtpAddress is filled in and message forwarding is working. The strange thing is that this way the setting is not showed in EAC.
Is this a known issue since Exchange 2013 CU10
Ronald Van Der Meer