Verification Code Mail is delayed

If you have greylisting enabled in your mail filter, that is likely the cause.  You may want to start a real Sophos Support case at https://support.sophos.com for further investigation.

Hello,

Thank you fro your response, le me check with our sysadmin.

Regards,

Diamondra

But why when I click "Modifier la Methode MFA" th email is coming quickly ?

Regards,

Diamondra

The MFA email comes from Azure which uses a bunch of different IPs for sending emails, randomly ... greylisting affects these.  the other email requests you are talking about I believe come from a much smaller set of originating IPs which typically email filters that use greylisting learn rather quickly.  This is just based on past experience with other customers of mine.