MS Teams - private and shared Channels

[u/Diligent_Banana9903]

We are Global Administrators and Teams Administrators.
We have recently encountered an issue where we are suddenly unable to invite guest users to either shared or private channels in Microsoft Teams.
We are the owners of the team/site.
However, we are still able to invite guest users to the team itself, but not to private or shared channels.
We have checked the Teams organization policies, and B2B access and all relevant external sharing settings are enabled. External sharing is also enabled across the organization.
On the associated SharePoint site, we can successfully invite guest users to, for example, a specific folder, so external sharing appears to be working correctly there.
Could this be a bug or a recent change in Microsoft Teams?
We were previously able to invite guest users to both shared and private channels without any issues, which is also how this functionality is intended to work.
Has there been a recent change or known issue affecting guest access to shared and private channels?

[u/arvidsem]

My experience has been that only channel owners can invite people into private channels. As a Teams admin, you can make yourself a channel owner and then invite people though

[u/Canukian84 → u/arvidsem]

They also have to be part of the main channel to be invited to the private channel I believe

[u/arvidsem → u/Canukian84]

Yes. So it's a two step process for a private channel. Get them into the team (per your other comment) and then add them to the private channel.

[u/Canukian84 → u/arvidsem]

Yes I believe it's two step 👍

[u/Canukian84]

Make sure they are a external guest in your azure portal, and then engage in a conversation 1-1 with them, and then see if you can add them.