We are currently aware that some customers may encounter signature verification errors during repository updates due to the expiration of the Ubuntu packaging GPG key.
To resolve this issue, please run the following command in your terminal:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 5234D2B73B6996C7
This will retrieve the updated GPG key from the Ubuntu keyserver and allow you to continue with your repository updates without encountering signature verification issues.
As this is an issue on Zimbra Ubuntu Packaging GPG Key expiration, all other OS packages are not affected.
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