Hello all,
Today I created user in AD then open ECP and create user mailbox as "Existing user" this normally step every day work, but today after created user and setup on outlook not sync anything and I showing something
This attached from user have a problem

and this from normal user

I try remove this user and make it again but the same, also try create test user he working fine.
I check virtual directory internal/external url
Exchange 2016 on-prem




