Step 1: Go to the TMS URL: 

Step 2: Choose the correct account

Step 3: Click on the TMS User menu item.

Step 4: Click on the Manager sub-menu item.

Step 5: Click on the Manager you wish to add the Extensions to. 

Step 6: Click on the arrow next to the Distribution tab at the top toolbar. 

Step 7: Click on the “Extension” tab. (All available Extensions will appear.)

Step 8: Double-click on the extension you want to put under management.

Step 9: Click on the “Put under Management” tab.

Note: When assigning, extensions, ALWAYS ensure the correct manager is chosen first.