I'm trying to configure CRM Online to use Server-Side Synchronization for email. We have Office 365 and Exchange Online setup with a Hybrid Exchange solution using DirSync. Our primary e-mail addresses are in the @green***.com domain, and the mailboxes also have a secondary SMTP address in the @green***.onmicrosoft.com domain. Autodiscover.green***.com points to our on Premises Exchange 2013 CAS server per the Hybrid documentation and works fine for Outlook and mobile devices. When I set the primary e-mail address in the CRM Online User/Mailbox to be @green***.com I get messages saying that "The mailbox location could not be determined while sending the email..." and "The mailbox location could not be determined while sending the email".
If I change the primary e-mail address in CRM Online to be @green***.onmicrosoft.com it finds the mailbox and can send e-mail properly.
Is this normal behavior? Will it cause problems if we set up a queue or try to enable inbound messages to @green***.com addresses? I'd also rather not have to manually set each user's email address to be green***.onmicrosoft.com when configuring new users. That's an extra step that could be easily missed.
Thoughts?
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