When an employee is unable to access the company portal using a VPN on their personal smartphone, the most likely cause is:
* The smartphone is not enrolled in MDM service:Mobile Device Management (MDM) services often control access to company resources. If the smartphone is not enrolled, it may be blocked from accessing the VPN and, consequently, the company portal.
* The application must be purchased by the company:Unlikely, as most VPN applications are free to download or included in the company's software package.
* The smartphone is not on the latest OS version:While this could cause compatibility issues, it is less likely than the MDM enrollment issue.
* The application fails to install and launch:This would be a different problem and would usually present specific error messages.
Reference:
CompTIA A+ 220-1102 Exam Objectives, Section 2.7: Explain common methods for securing mobile and embedded devices.
MDM configuration and access control documentation.