Go to Retail > Common > Workers.
Select the worker (Operator ID) that you are trying to activate the device for and then on the Worker tab, click Edit.
In the left pane, click Profile, and then check the personnel number. This should be same as the Operator ID you are trying to use for activation.
In the left pane, click Retail, and then change the password.
Go to Retail > Periodic > Data distribution > Distribution schedule.
Run job 1060 (Staff) and wait for it to finish.
Activate the device again using the correct operator ID and updated password.
The device should now activate successfully.
Reference:
docs.microsoft.com/.../troubleshoot-connectivity-problems-for-retail-modern-pos-devices