VMware states that the signing of dll's and executables for Horizon is no problem.
vmware states:
As per our discussion, the internal certificates responsible for these DLLs would be expected to regenerate once they expire tomorrow morning. No action is required until this time, where you can check to see that they were recreated successfully.
After checking internally, this will not be a problem for horizon as it is not sign in the same way.
UEM was using an internal CA for some services without timestamps now corrected but horizon uses a public CA with timestamps.
“Is timestamped code valid after a Code Signing Certificate expires?
Digicert timestamp services allow you to timestamp your signed code. Timestamping ensures that code will not expire when the certificate expires because the system validates the timestamp. If you use the timestamping service when signing code, a hash of your code is sent to the timestamp server to record a timestamp for your code. A user’s software can distinguish between code signed with an expired certificate that should not be trusted and code that was signed with a Certificate that was valid at the time the code was signed but which has subsequently expired.
Please specify the timestamp server url you need when you sign your code. Digicert provides you with both a SHA-1 and SHA-256 RFC 3161 timestamping URLs.
The timestamp server validates the date and the time that the file was signed therefore the certificate can expire but the signature will be valid for as long as the file is in production. A new certificate is only necessary if you want to sign additional code or re-sign code that has been modified.
If you do not use the timestamping option during the signing, you must re-sign your code and re-send it out to your customers.
To verify if your file has been timestamped, you can use the verifying commands provided in our knowledge base articles. The date and time will be displayed when the file has been timestamped. No dates or a warning will appear when the file has NOT been timestamped.
See: Instructions to sign and timestamp your code.”
Reference : https://knowledge.digicert.com/generalinformation/INFO1119.html
