What is recommended email configuration from Microsoft for @tenant.mail.onmicrosoft.com ?

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What is recommended email configuration from Microsoft for @tenant.mail.onmicrosoft.com ?

As I have tenant.com is in use already. Thanks.

2 Replies
Can you be a bit more specific here, what kind of configuration are you talking about? Generally speaking, this domain is used for Hybrid scenarios only.
Thanks Vasil for your response. Basically, I wanted to know which mail flow it will be used.
If possible, a documentation with this domain (@tenant.mail.onmicrosoft.com) scenarios or example email flow will be helpful. Thanks in advance.