Teams - issue with different names appearing on different devices on a call

Hi,

When I click on an invite for a teams call on my I-pad it launches me into the call, and my initials and correct name appears on the screen. However, for the other participant on the call, my initials appear as YB and the name Yeah Boy on their device. It is the same when I call on my Android phone, but I don't have the issue on my PC, my correct initials and name appear on both devices.

So it is like I have 2 different identities set up on my one e-mail, but for the life of me I can't get rid of the Yeah Boy. I did find this reference in my Skype and X-box accounts (I think my son may have added the title when speaking to friends), so I have corrected back to my name but still I can't solve the problem.

Any advice please?

Thanks

Martin