I am also having similar problems here at my place. It seems to be a common problem of Microsoft Teams Desktop APP having conflicts with 1:1 callings when the Remote VPN client initiates a call. Microsoft pretty much just says split tunnel Teams traf...

We are running into this near exact problem except sometimes the VPN remote user calls will work when calling the LAN... It is a strange one, I read it has something to do with SSL certs being denied, could that be the cause why it is intermittent?

Anyone found a solution for this? I also have some interfaces with no option of adding my Netflow monitor but on others, on the same device, I have the option.