Site prompting for username and password when accessing in browser

Prompt for Username and password when accessing the site in Plesk:
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Issue : We may get a pop-up prompting for username and password when we access a site in the browser.

Cause : The permission for the User will be wrong.

Resolution : Please check whether 'Plesk Domain user, Plesk IIS user and Plesk IIS WP user' is allowed for the domain. If not please add the user for this domain. You can add permission as follows.

Steps:
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1. Open IIS Manager.

2. Select the domain name in the left side under "websites".

3. Right click on the domain name and click permissions.

4. In the first tab called 'security', check whether all the users are available.

5. If any of the user is not there, then add user as follows.
    * Click 'add' under security tab.
    * Click 'Advaced..' in the 'Select Users or Groups' window.
    * Now click 'Find Now'.
    * Select the user which you want to add (Plesk Domain user/Please IIS user/Plesk IIS WP user)
    * Click 'ok' in all the tabs to add the user.

6. Now access the domain in the browser.

Note :
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Plesk Domain user - Username
Plesk IIS user   - IUSR_Username
Plesk IIS WP user - IWPD_Username

The issue is fixed :)

Have a nice day :)