I added a Teams Channel within a Call Queue. The Team has 21 members but only 17 agents are shown up. All have a E5 license and a personal number. Anyone had a similar behaviour?
Since the community has not yet responded to your post, you might want to seek assistance with other resources that are focused on tech support:
Ask your IT manager to open a support case or call Microsoft using the support line you were given. Other options for business subscription admins are listed here:
Additional tech support is available at support.microsoft.com or Answers.microsoft.com, where authorized Microsoft agents are available to trouble an issue until it’s resolved.
