Change Extension number or Sync Existing Extension of 365 User.

[clarkjesse]

We have existing customers that would like to integrate with 365. They already have an extension number or they are switching to 3cx from another system. Either way they already have an existing extension number that is known publicly (web, business card, etc). How can we connect an existing extention to a 365 user?

18.0.1880
Installed on AWS not hosted by 3cx

I've tried updating the existing extension with the email from 365 in hopes it would connect them, but that didn't work.

Is this support or will it be supported in the future?

Jesse

 

[charles]

This is not possible with 365 integration as there are no parameters within 365 to populate the extension number with, that will then allow the extension number to be imported into 3cx from 365.

 

[NickD_3CX]

What charles said.
The only thing you could do is:

1. Make sure MS 365 is disabled in 3CX
2. Create the Extensions manually in 3CX, set the desired Extension Number and as their email, put the MS365 UPN (usually the same as the email...).
3. Enable the 3CX MS 365 integration and Enable User Sync and make sure that user with that UPN is selected.
4. 3CX will match the existing email address against the UPN, and should use that extension with the Extension Number. You can verify this by going to the "Users" node, next to the extension you should now see in the "Synced with" column "Microsoft 365".