Problem with duration of certificate for MDM when installing Catalina

build 20252

There is a problem with the duration of the certificate used for MDM. Apple requires this to be less than 825 days. This caused a Mac enrolled in DEP to report that there was a problem with the certificate chain when it got to the Remote Management screen of Setup Assistant. This was observed when installing 10.15.2 on the target machine. When this was later retried using 10.14.6 this issue did not occur.

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