There doesn't appear to be a response when run from an ssh session and substituting the various data for our servername, email, and user account.
Its possible I am executing it wrong I suppose. I have removed any sensitive information from the version I ran. We have logged into the mailbox and sent a message so there would be content in the folder to ensure its working properly.
curl-apd -g -s --ntlm -k -X POST -H 'Content-Type: text/xml; charset=utf-8' -d "<?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages"><soap:Header></soap:Header><soap:Body><GetFolderxmlns="http://schemas.microsoft.com/exchange/services/2006/messages"><FolderShape><t:BaseShape>IdOnly</t:BaseShape></FolderShape><FolderIds><t:DistinguishedFolderId Id="inbox"><t:Mailbox><t:EmailAddress>F5HealthCheck1@****.com</t:EmailAddress></t:Mailbox></t:DistinguishedFolderId></FolderIds></GetFolder></soap:Body></soap:Envelope>" -u OURADDOMAIN.com\saf5healthcheck1:******* http://123.123.123.123:443/EWS/Exchange.asmx | grep -i "<m:GetFolderResponseMessage ResponseClass="Success">"