Managing Domains Flashcards
What are the main services in Office 365 that require DNS records?
Exchange, Skype for Business, and Mobile Device Management (MDM)
What are the types of DNS records needed for Exchange Online?
MX record, SPF record, and CNAME record for autodiscover
What are the types of DNS records needed for Skype for Business?
: CNAME records (for SIP and lyncdiscover) and SRV records (for _sip._tls and _sipfederationtls._tcp)
What are the types of DNS records needed for Mobile Device Management (MDM)?
CNAME records for Enterprise Registration and Enterprise Enrollment
How can you verify the SRV records using the command-line tool?
Use the “nslookup -q=SRV _sip._tls.example.com” and “nslookup -q=SRV _sipfederationtls._tcp.example.com” commands, replacing “example.com” with your domain name.
What are the port numbers used for SIP and SIP Federation TLS?
SIP uses port 443 and SIP Federation TLS uses port 5061.
What is the purpose of an SPF record?
An SPF record is a text record used to validate the accepted sending locations for emails, preventing unauthorized senders from using your domain.
What are the two domain settings in Exchange and their implications?
Authoritative - Exchange Online is the final authority on email delivery; Internal Relay - Exchange Online passes on messages for mailboxes it doesn’t recognize to external email domains.
What is the default domain setting for Exchange services in Office 365?
By default, any domain added into Office 365 and configured for Exchange services is considered Authoritative.
What are the three types of accepted domains in Exchange organizations?
The three types are Authoritative, Internal Relay, and External Relay.
What is an Authoritative domain?
An Authoritative domain is a domain where the Exchange organization hosts all the mailboxes for that domain. Any email sent to an unknown recipient is rejected. This is the default setting when adding a domain in Microsoft 365.
What is an Internal Relay domain?
An Internal Relay domain is an email domain where Exchange hosts some, but not all, of the mailboxes for that domain. If Exchange doesn’t recognize the recipient, it will forward the email to another mail server instead of rejecting it.
What is an External Relay domain?
An External Relay domain is a domain where Exchange receives email but doesn’t host any of the mailboxes
Can you configure domains for External Relay in Exchange Online?
No, you can’t configure domains for External Relay in Exchange Online. The only two options available are Authoritative and Internal Relay.
What is a shared SMTP namespace?
shared SMTP namespace is a scenario where two or more email systems share the same domain name for email addresses. This is typically seen when configuring Office 365 to co-exist with a migration from a third-party hosting provider like Google Mail, or a third-party hosted Exchange system.
