We have a Exchange 2013 server and Outlook 2010 clients. I have set full permission on other mailboxes with Powershell and in the ECP I set Send As permission for this user. But when I start Outlook 2010, go to the mailbox of one of the users and try to
send an email as this user, the Outlook gives the error that send as is not allowed. What could the problem be?
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