Thanks for reaching out.
Trusted Signing certificate aims to simplify certificate management and moreover provide a fully automated certificate lifecycle management solution.
To reduce the abuse and misuse of signing, Azure Signing provides short-lived certificates to cover any incidents of misuse and abuse.
As part of Zero touch certificate cycle management, certificates are renewed daily and are valid for only 72 hours which cannot be updated due to security reasons.
In case of misuse or abuse, Trusted Signing immediately takes the necessary steps to mitigate and remediate any threats on short lived certificates.
Hope this will help.
Thanks,
Shweta
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