From Apple 2. 5 Performance: Software Requirements Guideline 2.5.4 - Performance - Software Requirements
We noticed that your app declares support for location in the UIBackgroundModes key in your Info.plist file but does not have any features that require persistent location. Specifically, your app uses location background mode for the sole purpose of tracking employees, which is not appropriate on the App Store.
Next Steps
To resolve this issue, please revise your app to include additional features for your users that require the persistent use of real-time location updates while the app is in the background.
If tracking your employees' locations is your only intended use of background location, it would be more appropriate to distribute and sell your app as a custom B2B app, directly to CBS Clean, through the Volume Purchase Program. Additional information about the Volume Purchase Program and the Custom B2B Store is also available in iTunes Connect Developer Help.
Request a phone call from App Review
At your request, we can arrange for an Apple Representative to call you within the next three business days to discuss your App Review issue.
To request a call and ensure we have accurate contact information, reply directly to this message with a contact name and direct phone number to reach you.
i have developed a app for cleaners..cleaners location should be fetch in background for their payroll calculations and safety measurements..and also cleaners can view their worked places in mapview...but my app gets rejected..now what should i do..how to deal with this issue