whmcs department no email coming out

[battles]

I'm changing email accounts for our billing department created in WHMCS. Using an 0365 exchange account. Have entered username, pw, port, smtp server all correct.

I can get tickets created, but replying to them in WHMCS - nothing comes out.

Our support email is just fine. Same port/smtp server settings.

What do I need to look for?

[zitu4life]

Did you setup on cpanel DNS zone editor ....MX records with google parameters

aspmx.l.google.com
alt1.aspmx.l.google.com
alt2.aspmx.l.google.com
alt3.aspmx.l.google.com
alt4.aspmx.l.google.com

Edited April 16, 2020 by zitu4life
Both emails support and billing are from gsuite, or you have emais created on cpanel and others on gsuite?ohhhh your email are from office microsoft360... did not see before

[battles]

huh? 0365. I'm using pop import method.

our support@ domain email / tickets are working fine.

our billing@ is not working

[zitu4life]

1 - make sure emails are not used in cpanel owner account
2 - Ensure emails, password, port are correct
3 - check utilities email log
4 - if incoming emails are OK and issues with outgoing, sounds like server config issues.
5 - Ensure low secure app access are activated on your email
6 - double check all your parameters