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3,079I'm trying to set up a test server, and just created a gmail account to use for outgoing email, to be able to test workflows. I entered in all the info as per guides I found (bottom answer here as one example: https://community.dynamics.com/crm/f/117/t/265652). Any time I try to activate a mailbox I get:
"The email message "Your mailbox is now connected to Dynamics 365" cannot be sent because an error occurred while establishing a secure connection to the email server. Mailbox <name was here> didn't synchronize. The owner of the email server profile Gmail has been notified.
Email Server Error Code: Smtp server returned OutgoingServerSecureChannelError MustIssueStartTlsFirst exception."
However, I tried these same settings on a v8 server with no problems. So that rules out the two supposed causes for that error - the credentials being wrong, or the allow less secure apps setting being disabled (I triple checked these anyway, to be sure). I don't see anything in the event viewer of the v9 server. I tried turning the Windows firewall completely off for the v9 server, just to rule that out. Anyone have any other suggestions of where I can try to track this down? To confirm, has anyone successfully configured Gmail SMTP on v9 on-prem yet?
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