Windows Server Security-Modify administrator's cup

After the Administrator name of the Web server was modified last time, a cup was taken to show that IIS could not access the original UNC path.

After one morning, I finally created an account on the accessed server, which is the same as the account renamed by Administrator. But I still don't understand why I can access UNC path on other machines without administrator.

The specific process is as follows:

The IIS Site of 192.168.0.15 accesses the share directory on 192.168.0.18.

At the beginning, IIS was asked to use administrator to access share for verification.

For the sake of security, after the administrator of 192.168.0.15 is changed to xxxx_administrator, it is found that IIS cannot access share.

Later, I found a lot of information and wanted to create a new account to access share.

Finally, a xxxx_administrator with the same name as 192.168.0.15 is created at 192.168.0.18.

I still don't know why I can't use other accounts to access windows. It's complicated to set windows permissions!