Why doesn't one person in my organization see the availability of other calendars?

Question

Outlook

Outlook 2016, Exchange 2010.
A new user came, an account was created for him + mail according to a template. The problem came up that he cannot create appointments / meetings, because. when an employee adds others to a meeting, he does not see his employment. Here is an example from any other user, the employment of others by an employee is visible to them:

And this new (the only one in the company!) User has a full-width blocking with the "No data" bar.
What to do, where to look for the problem?
UPD: Through "Get-Mailbox -Identity [email protected] | fl >Z:\file01.txt" I uploaded the attributes of different users, then compared them line by line. There are no differences (apart from usernames and guid).