Problem sending mail from R using mailR package

[ghareesh]

Hi,
I am trying to schedule sending an attachment mail through mailR package using office365.
Below is code snippet..

send.mail(from = from,
            to = to,
            subject = subject,
            body = body,
            smtp = list(host.name = "https://outlook.office365.com/EWS/Exchange.asmx", port = 443,
                        user.name = "user@company.com", passwd = "password", tls = TRUE),
            authenticate = FALSE,
            attach.files = c("./file.csv"),
            file.names = c("file.csv"),
            file.descriptions = c("Description"))

I am getting below error.

org.apache.commons.mail.EmailException: Sending the email to the following server failed : https://outlook.office365.com/EWS/Exchange.asmx:443
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1410)
	at org.apache.commons.mail.Email.send(Email.java:1437)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lNULL
ang.reflect.Method.invoke(Method.java:498)
	at RJavaTools.invokeMethod(RJavaTools.java:386)
Caused by: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: https://outlook.office365.com/EWS/Exchange.asmx, 443; timeout 60000;
  nested exception is:
	java.net.UnknownHostException: https://outlook.office365.com/EWS/Exchange.asmx
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2053)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:697)
	at javax.mail.Service.connect(Service.java:364)
	at javax.mail.Service.connect(Service.java:245)
	at javax.mail.Service.connect(Service.java:194)
	at javax.mail.Transport.send0(Transport.java:253)
	at javax.mail.Transport.send(Transport.java:124)
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1400)
	... 6 more
Caused by: java.net.UnknownHostException: https://outlook.office365.com/EWS/Exchange.asmx
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:310)
	at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:236)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2019)
	... 13 more
Error: EmailException (Java): Sending the email to the following server failed : https://outlook.office365.com/EWS/Exchange.asmx:443

The host name is provided as present in server tab in account section of outlook
Can someone suggest way forward please?