I have created a QnA Bot in Azure, published it, and have attempted to open it in Microsoft Teams. However, when I do, I receive a message stating "Sending new messages to this bot has been disabled by your administration." I am the administrator.
I have spoken to two different Microsoft Support Engineers...
The first Engineer told me that I needed to make sure that "Allow sideloading of external apps" was turned on in Office 365 (Settings > Services & add-ins > Microsoft Teams > Apps). It appears to be turned off, but the option to change anything here is grayed out with a message stating that these settings have been migrated to the new Microsoft Teams Admin Center. This is when the Engineer asked me to create a new case with Office 365 to get this turned on.
I created a new case, spoke to the second Engineer who told me that those settings are now in the Microsoft Teams Admin Center. We navigated there, which I had before, and verified that both "Permission" and "Setup" policies beneath "Teams app" is set correctly.
The second Engineer didn't have an answer and told me that he'd get back to me because the settings are correct. Anyone have any ideas? Any advice is greatly appreciated!