Explanation
This is the most likely misconfigured setting because the default gateway is the router that connects the local network to other networks. If the default gateway is incorrect, the server will not be able to communicate with remote users or devices outside its own subnet. References:
https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/ipconfig

Open-source software is software that is freely available and can be modified and distributed by anyone. It usually requires very little technical support and has no licensing fees. Therefore, it would be the lowest cost solution for an application that does not need much support. Reference: https://www.comptia.org/training/resources/exam-objectives/comptia-server-sk0-005-exam-objectives (Objective 2.3)

The net use command is a Windows command that can be used to create a batch script to map multiple shares. The net use command can connect or disconnect a computer from a shared resource, such as a network drive or a printer, or display information about computer connections. The syntax of the net use command is:
net use [devicename | *] [\\computername\sharename[\u0003volume] [password | *]] [/user:[domainname\]username] [/user:[dotted domain name\]username] [/user:[[username@dotted domain name] [/savecred] [/smartcard] [{/delete | /persistent:{yes | no}}] where:
devicename = the drive letter or printer port to assign to the shared resource computername = the name of the computer that provides access to the shared resource sharename = the name of the shared resource password = the password needed to access the shared resource /user = specifies a different username to make the connection /savecred = stores the provided credentials for future use /smartcard = uses a smart card for authentication /delete = cancels a network connection and removes the connection from the list of persistent connections /persistent = controls whether the connection is restored at logon To create a batch script to map multiple shares, you can use the net use command with different drive letters and share names, for example:
net use W: \\computer1\share1 net use X: \\computer2\share2 net use Y: \\computer3\share3 You can also add other options, such as passwords, usernames, or persistence, as needed. To save the batch script, you can use Notepad or any text editor and save the file with a .bat extension12.

The term that is most likely part of the user authentication process when implementing SAML across multiple applications is SSO. SSO (Single Sign-On) is a way for users to be authenticated for multiple applications and services at once. With SSO, a user signs in at a single login screen and can then use a number of apps without having to enter their credentials again. SSO improves user experience and security by reducing password fatigue and phishing risks. SAML (Security Assertion Markup Language) is a protocol that enables SSO by providing a standardized way to exchange authentication and authorization data between an identity provider (IdP) and a service provider (SP). SAML uses XML-based messages called assertions to communicate user identity and attributes between parties.
Reference:
https://www.onelogin.com/learn/how-single-sign-on-works