Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
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|SBS 2011 File Replication Services Question||3||68|
|Sharepoint SBS 2011 to sharepoint online||4||51|
|Remote Server returned '<mail.mycompany #5.7.1 smtp; 554 5.7.1 Error: need authentication from mail.client.com>'||5||49|
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