Will answer the question below.
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Apple has recently updated its update delivery infrastructure. Please see the link for all the information from Apple. https://support.apple.com/en-us/HT201999
To get the iOS updates flowing through your XG, the existing in-built Apple Update exceptions will not work. To guard from being overwritten I duplicated the existing "Apple Update" exception policy and added this additional exception.
^([A-Za-z0-9.-]*\.)?cdn\-apple\.com
Hi,
please refer to this thread.
Ian
Since adding the extra lines, I have been able to remove some of the bypass just leaving HTTPS and policy intact.