PSTN calling gives wrong country prefix

[PatrikE]

We have users in Sweden, Norway, Finland, calling with Direct Routing. Now I have one user where Teams add the wrong country prefix when the prefix is missing. I have no configuration for adding country prefixes, but it has worked anyway. I just assumed Teams was looking at the users location to know what prefix to use, but not for this one newly added user. Any ideas of where to look? 

//P

[#2]

@Linus Cansby 

[#3]

When you say Users location. This is the Usage Location field e.g. From the Office 365 Admin Page, find user, go to Licenses and check country. Check this is correct for that particular user.
If you don't have specific dial plans set for each country that you assign to each user, then it uses this to determine your country's prefix codes\dial plans etc.