To resolve these issues you should run the steps in this article and check whether the groups in your sync's filtering preference contain users in Azure AD.
Alethea33f8
https://social.japrime.id/read-blog/263485_new-outlook-cannot-send-and-receive-email-microsoft-q-amp-a.html
Milagros Beeler is a high school from Vedano Al Lambro
Milagros Beeler is a high school from Vedano Al Lambro
To flush the DNS cache, you can open the Command Prompt on Windows and enter the command `ipconfig /flushdns`.