More unit tests. Fixes: 27236, 27126, 27229, 27230, 27231, 27232, 27235 [TFS Changeset #66358]
Fixes User object issues: 27199, 27201 [TFS Changeset #66310]
Fixes: 26281, 26308, 27166, 27168, 27169, 27171 [TFS Changeset #66294]