Cloud Hybrid Search Failures

Today, some regions may begin to notice Cloud Hybrid Search Service and SharePoint Insights failures. This is due to the SSL certificate for graph.windows.net having been renewed yesterday, 1/2/2019. When this certificate is renewed, you will begin seeing failures on the servers running the CSSA/Insights similar to the following:

In addition, the ULS will show similar logs to the following: To resolve this, restart the SharePoint Server Search and SharePoint Search Host Controller services on all search servers to resolve Cloud Hybrid Search. If you’re using SharePoint Insights, restart the SharePoint Insights service. Once restarted, the errors should disappear. The certificate for graph.windows.net is regionally updated so not all regions will experience the issue at the same time. You can determine when your region will expire the graph.windows.net by running the following cmdlet and using a browser to browse to the URL listed and examine the certificate.

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