---
title: "Removing Orphaned Host Instances from alarm mapping"
slug: "removing-orphaned-host-instances-from-alarm-mapping"
updated: 2024-01-19T08:47:19Z
published: 2024-01-19T08:47:19Z
canonical: "docs.biztalk360.com/removing-orphaned-host-instances-from-alarm-mapping"
---

> ## Documentation Index
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# Removing Orphaned Host Instances from alarm mapping

You might get an alert message for a mapped Host Instance as 'Configured Host Instance (Host Name: BTHost, Server Name:BT360SUP03). No longer exist in the Environment'.

If the web portal (Administration / Infrastructure Settings / Host Instances) does not list the old instance anymore, we must do the following:

Remove the host instances mapped to the alarm in Alarm Mapping and restart the monitoring service once.

For V9.1 or below follow the below image:

![image.png](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image%28184%29.png){height="" width=""}


For V10.0 and above follow the below image:

![image.png](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image%28185%29.png){height="" width=""}

After removing the mapping, reconfigure the particular alarm.