Stephane,

Could you clarify what the format issue is, as the display of the phone number is just a display.  In Sage 300, you can select to either have the brackets visible or not.

The underlying data is an unformatted phone number.  This setting is located in Common Services, Company profile, on the Address tab you select format on or off.

The phone number in CRM can be separated or not depending on a setting in CRM.  If you change Area Code to Off, and format in Sage 300 is off, then the phone number will be unformatted in CRM.

This setting is in CRM Administration, System, System Behavior.

I’ve run into that phone number issue with Sage 300 before, so I get how frustrating it can be. From what I’ve seen, it often has to do with how the system validates or stores phone numbers. One thing that helped me was making sure the phone number was entered in the correct format. Sometimes, it needs to be in the international format (like +1 for the US). Also, you might want to double-check the settings for user verification or try updating the system if it hasn't been done in a while. I found a good article on phone number verification here: verification phone number that helped clear things up for me.