You need to identify the correct host name and port information. Which settings should you use?

You have a legacy application that needs to send email to employees. The legacy application runs on a client computer.
The legacy application must send email by using IMAP through Exchange Online.
You need to identify the correct host name and port information.
Which settings should you use?

• A. Imap.office365.com and port 993
• B. Imap.office365.com and port 143
• C. Outlook.office365.com and port 993
• D. Outlook.office365.com and port 143

Answer: Option C.

Explanation: 

For Office 365for business, use the following settings.
— IMAP4
— outlook.office365.com
— 993 implicit

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