# Question: Checking last source check-in

**URL:** <https://community.graylog.org/t/question-checking-last-source-check-in/31231>\
**Category:** Graylog Central (peer support)\
**Tags:** windows\
**Created:** [January 15, 2024, 1:15pm UTC](https://community.graylog.org/t/question-checking-last-source-check-in/31231 "2024-01-15T13:15:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![justassabas](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@justassabas](https://community.graylog.org/u/justassabas)\
**Post date:** [January 15, 2024, 1:15pm UTC](https://community.graylog.org/t/question-checking-last-source-check-in/31231/1 "2024-01-15T13:15:24Z")

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Hello,  
We are using Graylog OPEN and our inventory is 99% Windows OS machines (700+ device).  
How can you search lastest source check-in? We want to find out which source not sending log’s anymore.

We are not using Sidecar.

Thanks.

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**Author:** ![gsmith](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/gsmith/32/1222_2.png) [@gsmith](https://community.graylog.org/u/gsmith)\
**Post date:** [January 23, 2024, 4:42am UTC](https://community.graylog.org/t/question-checking-last-source-check-in/31231/2 "2024-01-23T04:42:47Z")

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Hey @justassabas

Not sure thats the awesome part of Graylog-Sidecar thou. I have created a widget to notifiy me when source count drops, BUT to know right away which node it is , Im not sure. Maybe this might help.

> [@Alerting/Notification when certain sources are not reporting](https://community.graylog.org/t/alerting-notification-when-certain-sources-are-not-reporting/19332/9):
>
> Here is a suggestion : Create an event definition that runs every X minutes (define X as you see fit). In aggregation, define a condition based on the card() of the “source” field. If it is anything less than your number of sources, fire an alert.

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [February 6, 2024, 4:42am UTC](https://community.graylog.org/t/question-checking-last-source-check-in/31231/3 "2024-02-06T04:42:52Z")

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