The Mail calendar app built into Windows 10 does not sync. If I turn off Kaspersky security cloud, the application syncs immediately and mails arrive.
Best answer by Anton Mefodys
could you please try the following:
Open Web-AV settings - Advanced settings - Trusted URLs - add the following address to the list:
Then reboot the OS and retest the issue.
Tell about the results.
According to my information the issue should not reproduce anymore (should be resolved with databases update).
So manually added Trusted URL rule is not needed anymore.