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Hi ss1,
Thanks for the response. The issue isn't caused by MYOB and relates to an issue blocking the client computer from downloading or installing the new certificate. Simply means that the Trusted Root certificate is missing. To confirm this:
Open Internet Explorer and enter the web address login.myob.com.
- Green address bar: A successful connection should not have any issues. (See photo attached below.).
- Red address bar or unable to connect: The connection is not successful, and you will need to follow the resolution provided below.

You will need to install the certificate manually. I recommend following the instructions again. Please note that you'll need to follow this with the help of your IT specialist or department.
Let me know if you require any further assistance with this. I'm happy to assist you.
Otherwise, if my response has answered your inquiry, please click "Accept as Solution" to help other users find this information.
Kind regards,
Shella
Our IT have contacted TBS-certificates (see my quote from them above). The URL for the trusted auth cert you provided has been confirmed BY THEM to be invalid and MYOB should not be providing this to its customers.
If you (or someone in the MYOB Security team) could provide us with a valid link to the trusted root auth cert, we can manually install it (that's not the issue here).
BTW The missing cert looks like it is from Google not TBS.
We also don't use IE 11 as that was made obsolete by MS several years ago. We use WIn Pro 11 with Edge and all the latest security patches.
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