I want to use outlook account by service Desk.

[Bumjun Cho]

I created service desk. but, my outlook accout did not use Receive Mail-box.

[Nic Brough -Adaptavist-]

See the doc referenced above

[Bumjun Cho]

I want to change e-mail.

As you know, 

JiRa service Desk e-mail request tab.

Cloud e-mail adress : support@sualab.atlassian.net

customer e-mail adress : support@sualab.com

So,

     send to e-mail adress -> support@sualab.atlassian.net

change

    send to e-mail adress -> support@sualab.com

How can I change do that?

[Nic Brough -Adaptavist-]

I think the host needs to be the domain you want to use, the TTL is standard, but I don't know what the value is.  In fact, I don't know what you're trying to do in that comment.

[Bumjun Cho]

yes, I tried it already. but, I can't.

One more,

host : amazonaws.com

value : atlassian-domain-verification=~~~~

TTL : 86400

is it right?

[Nic Brough -Adaptavist-]

I do not know, DNS is not my area.  Have you tried the checker?  https://domain-check.atlassian.com/ - this will report DNS problems as well as mail config problems

[Bumjun Cho]

How can I how to DNS?

my dns is sualab.com and I'm receiving a suppy from the DNS management site.

[Nic Brough -Adaptavist-]

I'm afraid that's a bit beyond me.  You need to make sure the DNS is recognised by Cloud servers.  Can you see it from home or somewhere else that is outside your own network?

[Bumjun Cho]

I tried 'DNS' verify type(TXT). and I login to domain site and puted it the DNS information

I waited for 3 days. 

clicked the "Verify domain", pop-up message is :

and Now, what should I do?

please, tell me your in advise.

[Nic Brough -Adaptavist-]

Ah, ok.  I think you need to tell Jira to send emails on behalf of your domain - see https://confluence.atlassian.com/adminjiracloud/configuring-jira-cloud-to-send-emails-on-behalf-of-your-domain-900996548.html

[Bumjun Cho]

I means, I have added an outlook account to the mail account of JiRa's service desk. The outgoing mail address is sent to XXX@XXX.atlassian.net to communicate with the customer.
I would like to change to support@XXX.com

[Nic Brough -Adaptavist-]

I am sorry, but the question does not make much sense.  An account for Service Desk will have an associated email address, but I don't know what you mean by "my outlook account did not use recieve mail box"