Hi there!
Several months I have a problem with delivering authentication emails from OneDrive to my Exchange 2010 users.
On my Exchange 2010 SP3 RU8 (RU8 will be uninstalled today, but that issue was in previous versions too), I have installed AntispamAgents:http://technet.microsoft.com/en-us/library/bb201691(v=exchg.150).aspx
Behavior of delivering OneDrive's messages is directly connected to Sender ID property in Organization Configuration -> Hub Transport -> Anti-spam tab -> Sender ID -> Action tab. If I choose "Reject message" what is my desired setup - I believe that SPF is very useful - any message from OneDrive is not delivered. In the Agent log appears that error:
550 5.7.1 Sender ID (PRA) Not Permitted
on particular message.
I have opened this (https://social.technet.microsoft.com/Forums/office/en-US/7462f3a8-8292-49f9-9cce-c67fcd7178f9/senderid-spf-include-keyword-bad-evaluation?forum=exchangesvrsecuremessaging#2e2b7d3e-8a9d-45ca-a22b-60b91fcb6694) thread but it I was misunderstand the issue, so Im posting it again.
Do anyone else confirm that issue?
Best Regards,
Jan Vojtech Vanicek