OMS Log Analytics search is now available in the Azure Portal. With this release, you can search and analyze all of the logs and metrics from your Azure environment as well as your on-premises assets. This means you can perform full diagnostic on your on-premises as well as in azure hybrid environment.
For access this feature, first you have to login to Azure account which the OMS work-space created and click the log analytics from the resource blade.
Once you select the new Log Search tile a new blade with Log Analytics Search opens. As the following screenshot shows it will be a familiar to OMS Log Search.In top search bar you can type the search query you want to execute to gather the information.
You can find more on this from here.