Outlook – How to disable the “You cannot access this right now” modal pop-up dialog in Outlook

Context

I have two email accounts added to my Outlook desktop client. One of them only is accessible when I am in a certain network, either directly plugged in or via VPN.

Now, when I am not in that particular network or VPN, this annoying dialog keeps popping up every couple minute; not like once an hour, but every darn few minutes!

The text says:

You cannot access this right now

Your sign-in was successful but does not meet the criteria to access
this resource. For example, you might be signing in from a browser,
app, or location that is restricted by your admin.

The More details links shows some account specific technical details like email address, "Triggered by conditional access", device plattform etc.

Problem

The problem is that this pop-up is modal and blocks Outlook until I click the OK button.

Also, it's sometimes hidden, so I only see the Outlook window which then looks frozen until I somehow get that pop-up to the front. The pop-up does not have a own entry in the Windows task bar, which means I have to click through all open Outlook windows until this pop-up becomes visible.

Workaround

One workaround would be to remove that account as long as I am not in that particular network so I can keep working with the other email account. But that is really tedious.

Another workaround would be to use Outlook Web Access in the browser instead of the desktop client, but that would be less convenient because I use a lot of keyboard shortcuts.

What I've tried

I've tried to disable Send/Receive but that didn't help. Even though Send/Receive is indeed disabled, that annoying pop-up keeps appearing.

• How to Disable an Outlook Email Account But Not Delete It

Question

Is there a way to prevent that modal pop-up from popping up every few minutes?

Version

• Microsoft Office 365 ProPlus Outlook version 1907