How can Jane's sign-in issues be resolved if she is listed as a contact in a security group?

Creating an account for Jane using Active Directory is the best solution for resolving her sign-in issues if she is listed as a contact in a security group. In organizational contexts, a contact is generally used for informational purposes and does not have the same privileges or capabilities as a user account. By establishing her as a full user within Active Directory, Jane would gain the necessary permissions and authentication access to sign in effectively.

This approach ensures that Jane is recognized by the system as a legitimate user with rights to access specific resources, participate in security groups, and perform actions that are restricted to user accounts. Without this conversion, she would remain unable to log in and utilize the system as intended, as contacts do not have the same functionality as user accounts.

The other options, while they may seem relevant, do not directly address the root of Jane's sign-in issues. For instance, simply assigning her permissions or removing her from the group does not result in the establishment of a user account, which is essential for proper sign-in functionalities.