When does Dynatrace remove management zone assignment after an entity becomes inactive?

[SureshKumar33]

Hi,

Once an entity is inactive, after how long Dynatrace removed the MZ assignment for that entity. Specifically, CUSTOM_DEVICES created via extension. 

Regards

[t_pawlak]

there is no specific timer for removing Management Zone (MZ) assignment.
The assignment disappears only when the entity itself is removed due to inactivity.
it works like that:
Dynatrace keeps entities only while they receive data --> If a CUSTOM_DEVICE stops sending data --> it becomes inactive --> After about ~72 hours without data, the entity is removed from active topology --> At that point the entity no longer exists -->  so MZ assignment is gone

If you set the timeframe to a past period (when the entity still existed and was assigned to the MZ),  it will still appear with that MZ assignment (because historical data is preserved)