Adding server manager access in the account doesn't automatically allow that username access, they also need to exist as a user in server manager.
You also need to enable the option in "System Properties > System Feature Settings > Shared System Options" for it to give you the option when you login to ESM. Otherwise you need to go to https://{MiVB IP}/server-manager to access it directly.
Hi sarond, thanks for the info. I was looking for something like this, a "simple switch".

To give you some context, I'll explain why I'm sure something has been changed (other than the obvious update). I'm far from an expert in Mitel systems, but without a doubt, creating new root user and giving them server manager access never stopped me before. I know this to be a fact, because we have couple of outside users with root privileges, who on occasion access the system remotely. When I go to a new site, I create my own root account, so that I can track the changes made by me vs everyone else.
Edit:"
Talking about shared system options, yes server manager access was disabled. Enabling it however, did not allow me to access it. I can see the login screen when I manually point to it (does not appear as a button still), but it does not recognize my user/pass combo. Not the new one, nor the existing ones.
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Is it possible there's something else I'm missing?
Edit: I guess system took a few minutes to distribute the new setting. I can now access Server Manager. I've also found that root users with Desktop Tool enabled, do not see the Server Manager button.