# Devices
With the built-in Flow Basic Mobile Security Management all connected mobile devices can be overviewed and managed directly in the Studio or via a workflow.\
If *Device Management* is enabled for the environment all new devices that tries to log in to the environment need to be approved before the user actually can log in to Flow via a mobile client. In the same way existing devices can be blocked if, for example, a device is lost or replaced.
Devices that are unhandled will have status *New* and an administrator can either *Approve* or *Block* the device. Every time a user logs in from an approved device will the *Last User* field be updated with the latest logged in user.
Until the device is approved the client user will get the message *This device has yet to be approved by a system administrator*.
If the device is blocked the client user will get the message *This device has been blocked by a system administrator*.
#### System event
With the system event *Device Status Changed* it is possible to automate some of the device management and for example alert administrators with an email if a new device is connected.
> Use the Flow environment connector and the functions related to *Device management* to for example approve or block devices via a workflow.
Read more about system events [here](https://home.novacuraflow.com/Help/latest/?help_root_environment_system_events).
#### Common questions:
**How to activate or deactivate device management?**
Menu selection Device will only appear in the menu if device management is activated for the connected Flow server.
* *Go to the Flow server installation folder*
* *Edit the web.config file*
* *Change the value of useDeviceManagement to true if device management should be used and false if device management should be turned off*
**Is device id the IMEI number?**
No, the device id is generated from an OS-specific API made for the purpose.\
Devices with iOS will generate a new device id if the Flow app is reinstalled.
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