Trying to configure 3PIP SIP devices

Valued Contributor

Hello teams community


Please i need help on this issue


I am trying to Add a Yealink Sip device Model T43U. When i dial the activation feature code *55* [the code] then the phone gives a request time out and does nothing. will you please check the admin.teams center for next license ?

1 Reply


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:

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