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SCCM clients unable to connect since new RootCA created

Last Modified: 2020-02-06
We recently dealt with an expiring certificate for a SubCA and the original offline RootCA was no longer available. We managed to create a new offline RootCA and use it to get the SubCA a new SubCA certificate. Since doing this, however, our SCCM hasn't been working properly. When looking at the list of Devices, all of them are shown as grey with an X; client activity shows as inactive and the last update was 7-10 days ago. Any help would be appreciated!
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