Add User to Administrator Group - Guide

Granting Administrator Rights to Users
When managing a network domain with multiple users, assigning administrator privileges requires adding the desired user to the Admin user group. This is a straightforward process, and the following steps outline how to accomplish this.
Accessing User Management
Initially, ensure you are logged in with an Administrator account or a profile possessing administrative rights within the domain. To begin, open the Run dialog box by pressing the Windows key + R.
Type "compmgmt.msc" (without quotation marks) into the Run dialog and press Enter or click OK. This command launches the Computer Management console.
Navigating to the Administrators Group
Within the Computer Management window, expand the "Local Users and Groups" section. Then, select "Groups" from the expanded menu.
Locate and double-click the "Administrators" group in the right-hand pane. This action will open the Administrators Properties window.
Adding a User to the Group
In the Administrators Properties window, click the "Add..." button to initiate the user selection process.
Selecting the User Account
Typically, when working within a domain environment, you can enter the user's first name and last initial into the "Enter the object names to select" field.
Click the "Check Names" button. If the user account exists within the domain's Active Directory, the name will be resolved and underlined. Confirm the selection by clicking "OK".
If the user cannot be found, it is likely that the account has not yet been added to Active Directory. Ensure the user account is properly provisioned in Active Directory before attempting to add it to the Administrators group.