Yes That is one solutions.
But this implicates changes in Our AD (AAD) in layout (and sometimes functionality) in other applications like Outlook, Sync to Smartphones, Signature App's,...
Means we need to change our Source data and modify other applications to fix this.
On the other hand looks to me a simple modification to strip all unnecessary characters of the AAD Mobile number to get it in a format +32123456789
Is there a way to add a feature request to 3CX for this ?
Reagrds
Kurt