It seems that when mentioning someone with the "@mention" notation the email is not being sent to the mentioned person if the comment is too long (420 characters + mention is sent, 450 characters + m...
v-lili6-msft
Community Support
Community Supporthi
I have teseted on my side, it works well.
I add comment with the "@mention" and 450 characters + in the comment. then add this user into subscription and click run now, but that user still get the subscription mail.
please try it again and also share your Repro Steps.
Regards,
Lin