Hi,
We've 2 licences for Office 365 (Exchange 2010) in our company but we have various emails like info@,sales@ etc. To avoid buying new licences just for the email addresses, I set up shared mailboxes for them (using this guide). They work fine in the Outlook Web App but not in the Desktop App. I can receive emails to them ok but when I want to send on behalf of say info or sales, I get a message saying:
"You can't send a message on behalf of this user unless you have permission to do so. Please make sure you're sending on behalf of the correct sender, or request the necessary permission. If the problem continues, please contact your helpdesk."
After doing a bit of searching, I found that there's a problem with the Offline Address Book. When I deleted that, it allows me to send on behalf of these email addresses but when the OAB resysncs with Exchange, the problem returns.
Is there any way to fix this permanently? The current 'solution' I'm using isn't really viable in the long term.
Thanks in advance!
