​We all know by now that we can invite guests in Microsoft Teams if the settings are in place.  Well, that depends on how settings are configured in your tenant.

As you can see that guest access is enabled in Microsoft Teams Admin Portal.  And, yes, this setting has been enabled for several weeks.

​When Teams owners or members invite guests from public Teams, they get this message:

​Teams owners share the same experience as the image above when trying to invite guests from private Teams.

​I ran into something I have not experienced before when creating a new Teams channel.

Aside from not being able to add these special characters (~#%&*{}+/\:<>?|'”..), I discovered that Teams allows only 50 characters for “Channel name”.

In my example below, it truncates “This is a very long channel description with 50 characters” to “This is a very long channel description with 50 ch”