I recently migrated from Coms to Vivaciti.
Both services TTB on SMPF LLU.
I have already requested a MAC from Vivaciti but they have provided me with exactly the same MAC as that which I supplied them with for my migration in.
Could it be possible that the MAC stays the same, particularly as both services use the same back end or is it one of the following...
Trying it on
Disorganisation / Incompetence
One would like to think it's the first option.