Unable to upload file to Microsoft teams

Hello SteveSimplyhealth 

Since the community has not yet responded to your post, you might want to seek assistance with other resources that are staffed by authorized agents:

• If you're a corporate user, 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:

Get support | Microsoft Docs

https://support.serviceshub.microsoft.com/supportforbusiness/create

• If you're not a corporate user, tech support is available at support.microsoft.com or Answers.microsoft.com.