Allow Periods in Software Update Group Names
When creating a Software Update Group, you cannot currently use periods in the name. For example, if you tried to create a Software Update Group named "Special Handling - .NET Framework 4.6.1" it would fail as periods are not allowed.
For bonus points, find any other disallowed characters and make the reason they are blocked go away.
Thanks for the help!
Nash Pherson (MVP) commented
The only others I found were #, /, and \
Not sure I care about having them available, but I don't know why they would be specifically prohibited.